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  • Displaying Image On SmallBASIC

    - by Nathan Campos
    I want to display a image using SmallBASIC. For this I've started by searching on the references, then I found a reference for IMAGE, that is like this: IMAGE #handle, index, x, y [,sx,sy [,w,h]] Then I found another to open files(OPEN): OPEN file [FOR {INPUT|OUTPUT|APPEND}] AS #fileN But I want to know some things: What image types this function can display? There is any real example to use IMAGE?

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  • fstream - correct error checking after output

    - by Truncheon
    What's the correct way to check for a general error when sending data to an fstream? I have the following code, which seems a bit overkill. int Saver::output() { save_file_handle.open(file_name.c_str()); if (save_file_handle.is_open()) { save_file_handle << save_str.c_str(); if (save_file_handle.bad()) { x_message("Error - failed to save file"); return 0; } save_file_handle.close(); if (save_file_handle.bad()) { x_message("Error - failed to save file"); return 0; } return 1; } else { x_message("Error - couldn't open save file"); return 0; } }

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  • Code Golf Christmas Edition: How to print out a Christmas tree of height N

    - by TheSoftwareJedi
    Given a number N, how can I print out a Christmas tree of height N using the least number of code characters? N is assumed constrained to a min val of 3, and a max val of 30 (bounds and error checking are not necessary). N is given as the one and only command line argument to your program or script. All languages appreciated, if you see a language already implemented and you can make it shorter, edit if possible - comment otherwise and hope someone cleans up the mess. Include newlines and whitespace for clarity, but don't include them in the character count. A Christmas tree is generated as such, with its "trunk" consisting of only a centered "*" N = 3: * *** ***** * N = 4: * *** ***** ******* * N = 5: * *** ***** ******* ********* * N defines the height of the branches not including the one line trunk. Merry Christmas SO!

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  • Javascript - why do I sometimes fail to read file content with GDownloadUrl?

    - by Daj pan spokój
    Hi everybody. I try to read some file with google's GDownloadUrl and it works only from time to time. failure means fileRows == "blah blah" success means fileRows == (real file content) I've noticed, however, that when I cease (with Firebug) the execution on line 3 for a couple of seconds, it succeeds more often. Maybe it is some kind of threading bug, then? Do You guys have any tip or idea? 1 var fileContent = "blah blah"; 2 availabilityFile = "input/available/" + date + ".csv"; 3 GDownloadUrl(availabilityFile, function(fileData) { 4 fileContent = fileData; 5 }); 6 fileRows = fileContent.split("\n");

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  • Writing to a file in Python inserts null bytes

    - by Javier Badia
    I'm writing a todo list program. It keeps a file with a thing to do per line, and lets the user add or delete items. The problem is that for some reason, I end up with a lot of zero bytes at the start of the file, even though the item is correctly deleted. I'll show you a couple of screenshots to make sure I'm making myself clear. This is the file in Notepad++ before running the program: This is the file after deleting item 3 (counting from 1): This is the relevant code. The actual program is bigger, but running just this part triggers the error. import os TODO_FILE = r"E:\javi\code\Python\todo-list\src\todo.txt" def del_elems(f, delete): """Takes an open file and either a number or a list of numbers, and deletes the lines corresponding to those numbers (counting from 1).""" if isinstance(delete, int): delete = [delete] lines = f.readlines() f.truncate(0) counter = 1 for line in lines: if counter not in delete: f.write(line) counter += 1 f = open(TODO_FILE, "r+") del_elems(f, 3) f.close() Could you please point out where's the mistake?

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  • 'Programming by Coincidence' Excercise: Java File Writer

    - by Tapas
    I just read the article Programming by Coincidence. At the end of the page there are excercises. A few code fragments that are cases of "programming by coincidence". But I cant figure out the error in this piece: This code comes from a general-purpose Java tracing suite. The function writes a string to a log file. It passes its unit test, but fails when one of the Web developers uses it. What coincidence does it rely on? public static void debug(String s) throws IOException { FileWriter fw = new FileWriter("debug.log", true); fw.write(s); fw.flush(); fw.close(); } What is wrong about this?

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  • Naive Bayesian for Topic detection using "Bag of Words" approach

    - by AlgoMan
    I am trying to implement a naive bayseian approach to find the topic of a given document or stream of words. Is there are Naive Bayesian approach that i might be able to look up for this ? Also, i am trying to improve my dictionary as i go along. Initially, i have a bunch of words that map to a topics (hard-coded). Depending on the occurrence of the words other than the ones that are already mapped. And depending on the occurrences of these words i want to add them to the mappings, hence improving and learning about new words that map to topic. And also changing the probabilities of words. How should i go about doing this ? Is my approach the right one ? Which programming language would be best suited for the implementation ?

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  • Reading from a file, atoi() returns zero only on first element

    - by Nazgulled
    Hi, I don't understand why atoi() is working for every entry but the first one. I have the following code to parse a simple .csv file: void ioReadSampleDataUsers(SocialNetwork *social, char *file) { FILE *fp = fopen(file, "r"); if(!fp) { perror("fopen"); exit(EXIT_FAILURE); } char line[BUFSIZ], *word, *buffer, name[30], address[35]; int ssn = 0, arg; while(fgets(line, BUFSIZ, fp)) { line[strlen(line) - 2] = '\0'; buffer = line; arg = 1; do { word = strsep(&buffer, ";"); if(word) { switch(arg) { case 1: printf("[%s] - (%d)\n", word, atoi(word)); ssn = atoi(word); break; case 2: strcpy(name, word); break; case 3: strcpy(address, word); break; } arg++; } } while(word); userInsert(social, name, address, ssn); } fclose(fp); } And the .csv sample file is this: 900011000;Jon Yang;3761 N. 14th St 900011001;Eugene Huang;2243 W St. 900011002;Ruben Torres;5844 Linden Land 900011003;Christy Zhu;1825 Village Pl. 900011004;Elizabeth Johnson;7553 Harness Circle But this is the output: [900011000] - (0) [900011001] - (900011001) [900011002] - (900011002) [900011003] - (900011003) [900011004] - (900011004) What am I doing wrong?

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  • read a file with both text and binary information in .Net

    - by Yin Zhu
    I need to read binary PGM image files. Its format: P5 # comments nrows ncolumns max-value binary values start at this line. (totally nrows*ncolumns bytes/unsigned char) I know how to do it in C or C++ using FILE handler by reading several lines first and read the binary block. But don't know how to do it in .Net.

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  • Need an algorithm to group several parameters of a person under the persons name

    - by QuickMist
    Hi. I have a bunch of names in alphabetical order with multiple instances of the same name all in alphabetical order so that the names are all grouped together. Beside each name, after a coma, I have a role that has been assigned to them, one name-role pair per line, something like whats shown below name1,role1 name1,role2 name1,role3 name1,role8 name2,role8 name2,role2 name2,role4 name3,role1 name4,role5 name4,role1 ... .. . I am looking for an algorithm to take the above .csv file as input create an output .csv file in the following format name1,role1,role2,role3,role8 name2,role8,role2,role4 name3,role1 name4,role5,role1 ... .. . So basically I want each name to appear only once and then the roles to be printed in csv format next to the names for all names and roles in the input file. The algorithm should be language independent. I would appreciate it if it does NOT use OOP principles :-) I am a newbie.

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  • Shorthand for nested null checking C#

    - by Myster
    As far as I know there is not a significantly more elegant way to write the following.... string src; if((ParentContent!= null) &&(ParentContent.Image("thumbnail") != null) &&(ParentContent.Image("thumbnail").Property("src") != null)) src = ParentContent.Image("thumbnail").Property("src").Value Do you think there should be a C# language feature to make this shorter? And if so, what should it look like? for example, something like extending the ?? operator string src = ParentContent??.Image("thumbnail")??.Property("width")??.Value; Apologies for the rather contrived example, and my over-simplified solution.

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  • What is the root directory OR how do I set the directory in DotNetZip

    - by Chris
    where does DotNetZip get it's root directory for saving. All the save examples don't show the directory. My goal is to recurse a folder and subfolders. In each folder I want to zip all the files into one zip and delete the source files. private void CopyFolder(string srcPath, string dstPath) { if (!Directory.Exists(dstPath)) Directory.CreateDirectory(dstPath); string[] files = Directory.GetFiles(srcPath); string msg; string zipFileName; using (ZipFile z = new ZipFile(Path.Combine(srcPath,String.Format("Archive{0:yyyyMMdd}.zip", DateTime.Now)))) { z.ReadProgress += new EventHandler<ReadProgressEventArgs>(z_ReadProgress); foreach (string file in files) { FileInfo fi = new FileInfo(file); AddLog(String.Format("Adding {0}", file)); z.AddFile(file); } //z.Save(Path.Combine(srcPath, String.Format("Archive{0:yyyyMMdd}.zip", DateTime.Now))); z.Save(); if (deleteSource) { foreach (string file in files) { File.Delete(file); } } zipFileName = z.Name; } if (!compressOnly) File.Copy(Path.Combine(srcPath,zipFileName), Path.Combine(dstPath, Path.GetFileName(zipFileName))); string[] folders = Directory.GetDirectories(sourcePath); foreach (string folder in folders) { string name = Path.GetFileName(folder); string dest = Path.Combine(dstPath, name); Console.WriteLine(ln); log.Add(ln); msg = String.Format("{3}{4}Start Copy: {0}{4}Directory: {1}{4}To: {2}", DateTime.Now.ToString("G"), name, dest, ln, Environment.NewLine); AddLog(msg); if (recurseFolders) CopyFolder(folder, dest); msg = String.Format("Copied Directory: {0}{4}To: {1}\nAt: {2}{3}", folder, dest, DateTime.Now.ToString("G"), Environment.NewLine); AddLog(msg); } }

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  • Reading a file from a jar, or anywhere on the classpath?

    - by Stefan Kendall
    I'm trying to build an application that builds a resource file into a jar, but I'd like to have the project runnable within eclipse. I have a basic maven 2 structure for my project, and I'm unsure how to read in the file such that it's found and used when run from the JAR or from within eclipse. Thought? Structure: src/main/java src/main/resources/file.txt Current reading method: getClass().getResourceAsStream("/file.txt") Is there reading method that will pick up src/main/resources/*, as well as the root level of the JAR (where resources are deployed)?

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  • Exception when ASP.NET attempts to delete network file.

    - by Jordan Terrell
    Greetings - I've got an ASP.NET application that is trying to delete a file on a network share. The ASP.NET application's worker process is running under a domain account (confirmed this by looking in TaskManager and by using ShowContexts2.aspx¹). I've been assured by the network admins that the process account is a member of a group that has Modify permissions to the directory that contains the file I'm trying to delete. However, it is unable to do so, and instead I get an exception (changed the file path to all x's): System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. --- System.UnauthorizedAccessException: Access to the path '\xxxxxxx\xxxxxxx\xxxxxxx\xxxxxx.xxx' is denied. Any ideas on how to diagnose/fix this issue? Thanks - Jordan ¹ http://www.leastprivilege.com/ShowContextsNET20Version.aspx

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  • How to start recognizing design patterns as you are programming?

    - by Jon Erickson
    I have general academic knowledge of the various design patterns that are discussed in GoF and Head First Design Patterns, but I have a difficult time applying them to the code that I am writing. A goal for me this year is to be able to recognize design patterns that are emerging from the code that I write. Obviously this comes with experience (I have about 2 years in the field), but my question is how can I jumpstart my ability to recognize design patterns as I am coding, maybe a suggestion as to what patterns are easiest to start applying in client-server applications (in my case mainly c# webforms with ms sql db's, but this could definitely be language agnostic).

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  • Modify Executing Jar file

    - by pinkynobrain
    Hello Stack Overflow friends. I have a simple problem which i fear doesnt have a simple solution and i need advice as to how to proceed. I am developing a java application packaged as and executable JAR but it requires to modify some of its JAR file contents during execution. At this stage i hit a problem because some OS lock the file preventing writes to it. It is essential that the user sees an updated version of the jar file by the time the application exits allthough i can be pretty flexible as to how to achieve this. A clean and efficient solution is obviously prefereable but portability is the only hard requirement. The following are three approaches i can see to solving the problem, feel free to comment on them or suggest others. Tell Java to unlock the JAR file for writing(this doesnt seem possible but it would be the easyest solution) Copy the executable class files to a tempory file on application startup, use a class loader to load these files and unload the ones from the initial JAR file.(Not had much experience with the classloaders but hopefully the JVM would then be smart enough to realize that the original JAR is nolonger in use and so unlock it) Put a Second executable JAR File inside the First, on startup extract the inner jar to e temporaryfile, invoke a new java process and pass it the location of the Outer JAR, first process exits, second process modifys the Outer jar unincumbered.(This will work but im not sure there is a platform independant way of one java app invoking another) I know this is a weird question but any help would be appreciated.

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  • Is it possible for competing file access to cause deadlock in Java?

    - by BlairHippo
    I'm chasing a production bug that's intermittent enough to be a real bastich to diagnose properly but frequent enough to be a legitimate nuisance for our customers. While I'm waiting for it to happen again on a machine set to spam the logfile with trace output, I'm trying to come up with a theory on what it could be. Is there any way for competing file read/writes to create what amounts to a deadlock condition? For instance, let's say I have Thread A that occasionally writes to config.xml, and Thread B that occasionally reads from it. Is there a set of circumstances that would cause Thread B to prevent Thread A from proceeding? My thanks in advance to anybody who helps with this theoretical fishing expedition. Edit: To answer Pyrolistical's questions: the code isn't using Filelock, and is running on a WinXP machine.

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  • Elegant way to take basename of directory in Python?

    - by user248237
    I have several scripts that take as input a directory name, and my program creates files in those directories. Sometimes I want to take the basename of a directory given to the program and use it to make various files in the directory. For example, # directory name given by user via command-line output_dir = "..." # obtained by OptParser, for example my_filename = output_dir + '/' + os.path.basename(output_dir) + '.my_program_output' # write stuff to my_filename The problem is that if the user gives a directory name with a trailing slash, then os.path.basename will return the empty string, which is not what I want. What is the most elegant way to deal with these slash/trailing slash issues in python? I know I can manually check for the slash at the end of output_dir and remove it if it's there, but there seems like there should be a better way. Is there? Also, is it OK to manually add '/' characters? E.g. output_dir + '/' os.path.basename() or is there a more generic way to build up paths? Thanks.

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  • Persist changes in C

    - by Mohit Deshpande
    I am developing a database-like application that stores a a structure containing: struct Dictionary { char *key; char *value; struct Dictionary *next; }; As you can see, I am using a linked list to store information. But the problem begins when the user exits out of the program. I want the information to be stored somewhere. So I was thinking of storing the linked list in a permanent or temporary file using fopen, then, when the user starts the program, retrieve the linked list. Here is the method that prints the linked list to the console: void PrintList() { int count = 0; struct Dictionary *current; current = head; if (current == NULL) { printf("\nThe list is empty!"); return; } printf(" Key \t Value\n"); printf(" ======== \t ========\n"); while (current != NULL) { count++; printf("%d. %s \t %s\n", count, current->key, current->value); current = current->next; } } So I am thinking of modifying this method to print the information through fprintf instead of printf and then the program would just get the infomation from the file. Could someone help me on how I can read and write to this file? What kind of file should it be, temporary or regular? How should I format the file (like I was thinking of just having the key first, then the value, then a newline character)?

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  • Having an issue with overwriting an element of a file correctly (numeric)

    - by IngeniousHax
    This is an ATM style program, but currently it doesn't do exactly what I need it to do... I need to get the current balance, and when money is transferred from either checking or savings, it should add it to checking and subtract it from savings. which is does, but not correctly... Input example -=[ Funds Transfer ]=- -=[ Savings to Checking ]=- Account Name: nomadic Amount to transfer: $400 New Balance in Checking: $900 // original was 500 New Balance in Savings: $7.7068e+012 // this should now be 1100... Here is my code, it's a lot of code, but there are no errors, so throwing it into an IDE and compiling should be fairly quick for whoever would like to help. mainBankClass.h mainBankClass.h #ifndef MAINBANKCLASS_H #define MAINBANKCLASS_H #include <iostream> #include <fstream> #include <string> using namespace std; class Banking { protected: string checkAcctName, saveAcctName; // Name on the account int acctNumber[13]; // Account number float acctBalance, initSaveDeposit, initCheckDeposit, depAmt; // amount in account, and amount to deposit public: char getBalanceChoice(); // Get name on account for displaying relevant information char newAccountMenu(); // Create a new account and assign it a random account number void invalid(char *); // If an invalid option is chosen char menu(); // Print the main menu for the user. virtual float deposit(){ return 0; } // virtual function for deposits // virtual float withdrawal() = 0; // Virtual function for withdrawals void fatal(char *); // Handles fatal errors. Banking(); }; class Checking : public Banking { public: friend ostream operator<<(ostream &, Checking &); friend istream operator>>(istream &, Checking &); Checking operator <= (const Checking &) const; void newCheckingAccount(); void viewCheckingBalance(); void transferFromSaving(); float deposit() { return (acctBalance += depAmt); } }; class Saving : public Banking { public: friend ostream &operator<<(ostream &, Saving &); friend istream &operator>>(istream &, Saving &); Saving operator <= (const Saving &) const; void newSavingAccount(); void viewSavingBalance(); void transferFromChecking(); float deposit() { return (acctBalance += depAmt); } }; class checkAndSave : public Banking { public: void newCheckAndSave(); void viewBothBalances(); }; #endif bankAccount.cpp #include <iostream> #include <sstream> #include <string> #include <iomanip> #include <fstream> #include <time.h> #include "MainBankClass.h" /*****************************\ | BANKING CONSTRUCTOR | \*****************************/ Banking::Banking() { string acctName; // Name on the account acctNumber[13] = 0; // Account number acctBalance = 0; initCheckDeposit = 0; initSaveDeposit = 0; depAmt = 0; }; /********************************\ | The following code is to print the menu | | and recieve the users choice on what | | they want to do with the ATM | \********************************/ char Banking::menu() { char choice; system("cls"); cout << "\t\t -=[ Main Menu ]=- \n\n" << "\tA) Create New Account\n" << "\tB) View Account Balance\n" << "\tC) Transfer Funds From Checking To Savings\n" << "\tD) Transfer Funds From Savings To Checking\n" << "\tE) Exit\n" << "\n\n\tSelection: "; cin >> choice; cin.ignore(); choice = toupper(choice); while(!isalpha(choice)) { invalid("[!!] Invalid selection.\n[!!] Choose a valid option: "); cin >> choice; cin.ignore(); } return choice; } /*********************\ | Will read in account choic | | and display it for the user | \*********************/ char Banking::getBalanceChoice() { char choice; fstream saveFile("saving.dat", ios::in | ios::beg); system("cls"); cout << "\t\t -=[ View Account Balance ]=-\n\n"; cout << "A) View Checking Account\n" << "B) View Saving Account\n" << "C) View Checking \\ Saving Account\n" << endl; cout << "Choice: "; cin >> choice; choice = toupper(choice); if(!isalpha(choice)) fatal(" [!!] Invalid Choice"); return choice; } /***************************\ | Incase an invalid decision to made | | this throws the error message sent | | to it by the calling area | \***************************/ void Banking::invalid(char *msg) { cout << msg; } /*************************\ | Used if files can not be opened | | and exits with code 251: | | miscommunication with server | \*************************/ void Banking::fatal(char *msg) { cout << msg; exit(1); } /***************************\ | Create an account, either checking | | or savings, or both. | | Must should create a randomly | | generated account number that will | | correspond with each account. | \***************************/ /************************\ NOTE:: WILL BE UPDATED TO CONTAIN A PIN FOR ACCOUNT VERIFICATION *************************/ char Banking::newAccountMenu() { srand(time(NULL)); // Seed random generator with time initialized to NULL char acctChoice; // choice for the account type ofstream checkFile("checking.dat", ios::out | ios::app); // For saving checking accounts ofstream saveFile("saving.dat", ios::out | ios::app); // For saving savings accounts system("cls"); cout << "\t\t-=[ New Account Creation ]=-\n\n" << endl; cout << "A) Checking Account\n" << "B) Savings Account\n" << "C) Checking and Saving Account\n" << endl; cout << "New account type: "; cin >> acctChoice; acctChoice = toupper(acctChoice); cin.clear(); cin.sync(); return acctChoice; } /********************************************************************* ********************************************************************** CHECKING ACCOUNT CODE ********************************************************************** **********************************************************************/ // New Checking Account Creation void Checking::newCheckingAccount() { system("cls"); ofstream checkFile("checking.dat", ios::out | ios::app); // For saving checking accounts cout << "\t\t -=[ New Checking Account ]=- \n" << endl; cout << "Name of the main holder to be on the account: "; getline(cin, checkAcctName); cout << "Initial deposit amount: $"; cin >> initCheckDeposit; if(initCheckDeposit <= 0) { while(initCheckDeposit <= 0) { invalid("[!!] 0 or negative amount entered\nMaybe a typo?\n"); cout << "Deposit Amount: $"; cin >> initCheckDeposit; } } if(!checkFile) fatal("[!!] Fatal Error 251: Miscommunication with server\n"); checkFile << checkAcctName << endl; for(int j = 0; j < 13; j++) { acctNumber[j] = (rand() % 10); // Build a random checking account number checkFile << acctNumber[j]; } checkFile << endl; checkFile << initCheckDeposit << endl; checkFile.close(); } void Checking::viewCheckingBalance() { fstream checkFile("checking.dat", ios::in | ios::beg); string name; int i = 0; double balance = 0; system("cls"); cout << "\t\t -=[ View Checking Account ]=-\n\n" << endl; cout << "Account Name: "; cin.sync(); getline(cin, name); getline(checkFile, checkAcctName); while(name != checkAcctName && !checkFile.fail()) { i++; getline(checkFile, checkAcctName); } if(name == checkAcctName) { system("cls"); cout << "\t\t -=[ Checking Account Balance ]=-\n\n" << endl; cout << "Account Name: " << checkAcctName << "\n"; cout << "Account Number: "; for(int j = 0; j < 13; j++) { char input_number; stringstream converter; checkFile.get(input_number); converter << input_number; converter >> acctNumber[j]; cout << acctNumber[j]; } // if balance a problem, try the below commented out line // checkFile.ignore(numeric_limits<streamsize>::max(), '\n'); cout << endl; checkFile >> acctBalance; cout << "Balance: $" << fixed << showpoint << setprecision(2) << acctBalance << endl; } else fatal("[!!] Invalid Account\n"); checkFile.close(); getchar(); } void Checking::transferFromSaving() // Move funds FROM SAVINGS to CHECKING { system("cls"); string name; long checkPos = 0; long savePos = 0; float savingBalance = 0; string saveAcctName; int i = 0; cin.clear(); fstream saveFile("saving.dat", ios::in | ios::out | ios::beg); fstream checkFile("checking.dat", ios::in | ios::out | ios::beg); cout << "\t\t-=[ Funds Transfer ]=-" << endl; cout << "\t\t-=[ Savings to Checking ]=-" << endl; cout << "Account Name: "; cin.sync(); getline(cin, name); getline(checkFile, checkAcctName); while(name != checkAcctName && !checkFile.fail()) { i++; getline(checkFile, checkAcctName); } getline(saveFile, saveAcctName); while(name != saveAcctName && !saveFile.fail()) { i = 0; i++; getline(saveFile, saveAcctName); } if(name == checkAcctName) { cout << "Amount to transfer: $"; float depAmt = 0; cin >> depAmt; for(int j = 0; j < 13; j++) { char input_number; stringstream converter; checkFile.get(input_number); converter << input_number; converter >> acctNumber[j]; } checkPos = checkFile.tellg(); // if the file is found, get the position of acctBalance and store it in ptrPos checkFile.seekg(checkPos); checkFile >> acctBalance; savePos = saveFile.tellg(); saveFile.seekg(savePos); // sending the cursor in the file to ptrPos + 1 to ignore white space saveFile >> savingBalance; if(savingBalance < depAmt) // if checking account does not have enough funds, exit with NSF code fatal("[!!] Insufficient Funds\n"); acctBalance += depAmt; // can be changed to an overloaded operator savingBalance -= depAmt; // can be changed to an overloaded operator checkFile.seekp(checkPos); // go to position previously set above checkFile << acctBalance; // write new balance to checkFile saveFile.seekp(savePos); // same thing as above comment saveFile << savingBalance; // write new balance to saveFile cout << "New Balance in Checking: $" << acctBalance << endl; // will be removed later cout << "New Balance in Savings: $" << savingBalance << endl; // will be removed later aswell } else fatal("[!!] Linked accounts do not exist.\n"); // if account is not found saveFile.close(); checkFile.close(); } /******************************************************** ******************************************************** SAVING ACCOUNT CODE ********************************************************* *********************************************************/ void Saving::newSavingAccount() { system("cls"); ofstream saveFile("saving.dat", ios::out | ios::app); // For saving savings accounts cout << "\t\t -=[ New Savings Account ]=- \n" << endl; cout << "Name of the main holder to be on account: "; getline(cin, saveAcctName); cout << "Deposit Amount: $"; cin >> initSaveDeposit; if(initSaveDeposit <= 0) { while(initSaveDeposit <= 0) { invalid("[!!]0 or negative value entered.\nPerhaps a typo?\n"); cout << "Deposit amount: $"; cin >> initSaveDeposit; } } if(!saveFile) fatal("[!!] Fatal Error 251: Miscommunication with server\n"); saveFile << saveAcctName << endl; for(int j = 0; j < 13; j++) { acctNumber[j] = (rand() % 10); saveFile << acctNumber[j]; } saveFile << endl; saveFile << initSaveDeposit << endl; saveFile.close(); } void Saving::viewSavingBalance() { string name; int i = 0; fstream saveFile("saving.dat", ios::in | ios::beg); cin.clear(); system("cls"); cout << "\t\t -=[ View Saving Account ]=-\n\n" << endl; cout << "Account Name: "; cin.sync(); getline(cin, name); getline(saveFile, saveAcctName); while(name != saveAcctName && !saveFile.fail()) { i++; getline(saveFile, saveAcctName); } if(name == saveAcctName) { system("cls"); cout << "\t\t -=[ Saving Account Balance ]=-\n\n" << endl; cout << "Account Name: " << saveAcctName << "\n"; cout << "Account Number: "; for(int j = 0; j < 13; j++) { char input_number; stringstream converter; saveFile.get(input_number); converter << input_number; converter >> acctNumber[j]; cout << acctNumber[j]; } // if balance a problem, try the below commented out line // checkFile.ignore(numeric_limits<streamsize>::max(), '\n'); cout << endl; saveFile >> acctBalance; cout << "Balance: $" << fixed << showpoint << setprecision(2) << acctBalance << endl; } else fatal("[!!] Invalid Account\n"); saveFile.close(); getchar(); } // NEED TO WORK ON THIS PORTION TOMORROW AND MONDAY, ADD OVERLOADED OPS FOR ASSIGNMENT!!!!!!! void Saving::transferFromChecking() // This is to take money FROM checking and ADD IT TO SAVING { system("cls"); string name; long savePos = 0; long checkPos = 0; float checkingBalance = 0; string checkAcctName; int i = 0; cin.clear(); fstream saveFile("saving.dat", ios::in | ios::out | ios::beg); fstream checkFile("checking.dat", ios::in | ios::out | ios::beg); cout << "\t\t-=[ Funds Transfer ]=-" << endl; cout << "\t\t-=[ Checking to Savings ]=-" << endl; cout << "Account Name: "; cin.sync(); getline(cin, name); getline(saveFile, saveAcctName); getline(checkFile, checkAcctName); while(name != saveAcctName && name != checkAcctName && !saveFile.fail() && !checkFile.fail()) { i++; getline(saveFile, saveAcctName); getline(checkFile, checkAcctName); } if(name == saveAcctName) { cout << "Amount to transfer: $"; float depAmt = 0; cin >> depAmt; for(int j = 0; j < 13; j++) { char input_number; stringstream converter; saveFile.get(input_number); converter << input_number; converter >> acctNumber[j]; } savePos = saveFile.tellg(); // if the file is found, get the position of acctBalance and store it in ptrPos saveFile.seekg(savePos); saveFile >> acctBalance; checkPos = checkFile.tellg(); checkFile.seekg(checkPos); // if file is found, store current position of the cursor to ptrPos checkFile >> checkingBalance; if(checkingBalance < depAmt) // if checking account does not have enough funds, exit with NSF code fatal("[!!] Insufficient Funds\n"); // Can also place overloaded op here acctBalance += depAmt; // can be changed to an overloaded operator checkingBalance -= depAmt; // can be changed to an overloaded operator saveFile.seekg(savePos); // go to position previously set above saveFile << acctBalance; // write new balance to saveFile checkFile.seekg(checkPos); // same thing as above comment checkFile << checkingBalance; // write new balance to checkFile cout << "New Balance in Savings: $" << acctBalance << endl; // will be removed later cout << "New Balance in Checking: $" << checkingBalance << endl; // will be removed later aswell } else fatal("[!!] Linked accounts do not exist.\n"); // if account is not found saveFile.close(); checkFile.close(); } /******************************************** ******************************************** CHECK AND SAVE CODE ********************************************** **********************************************/ void checkAndSave::newCheckAndSave() { system("cls"); ofstream saveFile("saving.dat", ios::out | ios::app); // For saving savings accounts ofstream checkFile("checking.dat", ios::out | ios::app); // For saving checking accounts cout << "\t -=[ New Checking & Saving Account ]=- \n" << endl; cout << "Name of the main holder to be on account: "; getline(cin, checkAcctName); saveAcctName = checkAcctName; cout << "Checking Deposit Amount: $"; cin >> initCheckDeposit; if(initCheckDeposit <= 0) { while(initCheckDeposit <= 0) { invalid("[!!] 0 or negative amount entered\nMaybe a typo?\n"); cout << "Deposit Amount: $"; cin >> initCheckDeposit; } } cout << "Saving Deposit Amount: $"; cin >> initSaveDeposit; if(initSaveDeposit <= 0) { while(initSaveDeposit <= 0) { invalid("[!!]0 or negative value entered.\nPerhaps a typo?\n"); cout << "Deposit amount: $"; cin >> initSaveDeposit; } } if(!saveFile || !checkFile) fatal("[!!] Fatal Error 251: Miscommunication with server\n"); checkFile << checkAcctName << endl; saveFile << saveAcctName << endl; for(int j = 0; j < 13; j++) { acctNumber[j] = (rand() % 10); checkFile << acctNumber[j]; saveFile << acctNumber[j]; } saveFile << endl; saveFile << initSaveDeposit << endl; checkFile << endl; checkFile << initCheckDeposit << endl; checkFile.close(); saveFile.close(); } void checkAndSave::viewBothBalances() { string name; int i = 0; fstream checkFile("checking.dat", ios::in | ios::beg); fstream saveFile("saving.dat", ios::in | ios::beg); system("cls"); cin.clear(); cout << "\t-=[ Saving & Checking Account Balance ]=-\n\n" << endl; cout << "Account Name: "; cin.sync(); getline(cin, name); getline(checkFile, checkAcctName); saveAcctName = name; /**********************\ | Checking Account portion | | of the checking & savings | | overview | \**********************/ while(name != checkAcctName && !checkFile.fail()) { i++; getline(checkFile, checkAcctName); } system("cls"); if(name != checkAcctName && checkFile.fail()) invalid("\n\n[!!] No Checking Account Found\n"); cout << "\t\t -=[ Checking Account ]=- \n" << endl; cout << "Account Name: " << checkAcctName << "\n"; cout << "Account Number: "; for(int j = 0; j < 13; j++) { char input_number; stringstream converter; checkFile.get(input_number); converter << input_number; converter >> acctNumber[j]; cout << acctNumber[j]; } // if balance a problem, try the below commented out line // checkFile.ignore(numeric_limits<streamsize>::max(), '\n'); cout << endl; checkFile >> acctBalance; cout << "Balance: $" << fixed << showpoint << setprecision(2) << acctBalance << endl; /*********************\ | Saving Account portion | | of the checking & saving | | overview | \*********************/ getline(saveFile, saveAcctName); while(name != saveAcctName && !saveFile.fail()) { i++; getline(saveFile, saveAcctName); } if(name != saveAcctName && saveFile.fail()) invalid("\n\n[!!] No Saving Account Found\n"); if(name == saveAcctName) { cout << "\t\t -=[ Saving Account ]=-\n\n" << endl; cout << "Account Name: " << saveAcctName << "\n"; cout << "Account Number: "; for(int j = 0; j < 13; j++) { char input_number; stringstream converter; saveFile.get(input_number); converter << input_number; converter >> acctNumber[j]; cout << acctNumber[j]; } // if balance a problem, try the below commented out line // checkFile.ignore(numeric_limits<streamsize>::max(), '\n'); cout << endl; saveFile >> acctBalance; cout << "Balance: $" << fixed << showpoint << setprecision(2) << acctBalance << endl; } if(name != saveAcctName && name != checkAcctName && saveFile.fail() && checkFile.fail()) fatal("[!!] No Accounts Have Been Found\n"); checkFile.close(); saveFile.close(); getchar(); } Main.cpp #include <iostream> #include "MainBankClass.h" using namespace std; int main() { Banking bank; Checking check; Saving save; checkAndSave CanS; char choice; choice = bank.menu(); // Call the banking menu switch(choice) { case 'A': choice = bank.newAccountMenu(); switch(choice) { case 'A': check.newCheckingAccount(); break; case 'B': save.newSavingAccount(); break; case 'C': CanS.newCheckAndSave(); break; default: system("cls"); bank.fatal("[!!] Invalid option\n"); break; } break; /***********************************************/ case 'B': choice = bank.getBalanceChoice(); switch(choice) { case 'A': check.viewCheckingBalance(); break; case 'B': save.viewSavingBalance(); break; case 'C': CanS.viewBothBalances(); break; default: bank.fatal("Invalid decision\n"); break; } /*************************************************/ break; case 'C': check.transferFromSaving(); break; case 'D': save.transferFromChecking(); break; case 'E': system("cls"); cout << "\t\t-=[ Disconnecting From System ]=-\n"; cout << "\t\t\t Thank you" << endl; cout << "\t\t Have a nice day!" << endl; exit(1); break; default: system("cls"); bank.invalid("\n\n\n\n\t\t [+] Invalid Selection \n\t\t[+] Disconnecting From System \n\t\t\tGood-bye \n\n\n\n\n\n\n"); exit(1); break; } return 0; }

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  • Using Multiple File Handles for Single File

    - by Ryan Rosario
    I have an O(n^2) operation that requires me to read line i from a file, and then compare line i to every line in the file. This repeats for all i. I wrote the following code to do this with 2 file handles, but it does not yield the result I am looking for. I imagine this is a simple error on my part. IN1 = open("myfile.dat","r") IN2 = open("myfile.dat","r") for line1 in IN1: for line2 in IN2: print line1.strip(), line2.strip() IN1.close() IN2.close() The result: Hello Hello Hello World Hello This Hello is Hello an Hello Example Hello of Hello Using Hello Two Hello File Hello Pointers Hello to Hello Read Hello One Hello File The output should contain 15^2 lines.

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  • May the FileInputStream.available foolish me?

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    This FileInputStream.available() javadoc says: Returns an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream. The next invocation might be the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes. In some cases, a non-blocking read (or skip) may appear to be blocked when it is merely slow, for example when reading large files over slow networks. I'm not sure if in this check: if (new FileInputStream(xmlFile).available() == 0) can I rely that empty files will always return zero?

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