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• Why does this getchar() loop stop after one character has been entered?

  - by Pieter

  #include <stdio.h> int main() { char read = ' '; while ((read = getchar()) != '\n') { putchar(read); } return 0; } My input is f (followed by an enter, of course). I expect getchar() to ask for input again, but instead the program is terminated. How come? How can I fix this?

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• c - why does it make sense that indexing a character pointer is an int?

  - by hatorade

  char *a = "apple"; printf("%s\n", a); \\ fine printf("%s\n", a[1]); \\ compiler complains an int is being passed Why does indexing a string pointer give me an int? I was expecting it to just print the string starting at position one (which is actually what happens when i use &a[1] instead). why do i need to get the address?

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• Limit Output in C

  - by Tech163

  In C, I would like to limit the string to the first 8 characters. For example, I have: char out = printf("%c", str); How can I make it so it only returns the first 8 characters?

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• Reading binary file with Octave

  - by Anthony Blake

  I'm trying to a binary file consisting of floats with Octave (on OS X), but I'm getting the following error: octave-3.2.3:2> load Input.dat R -binary error: load: failed to read matrix from file `Input.dat' The file was written like so: std::ofstream fout("Input.dat", std::ios::trunc | std::ios::binary); fout.write(reinterpret_cast<char*>(Buf), N*sizeof(double)); fout.close(); Any idea what could be going wrong here?

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• How to find "\r" in a conditional?

  - by Werner

  Hi, in a C++ program some string reads info from file, and in some part contains a "\r" character. I need to remove it, afte the read, in order to avoid problems. I thought about comparing strings character to character, I thought that "\r" would take two chars, but not, it is just one. how would i use a conditional ? if char[4]==`\r' ??? Thanks P.D. How would the problem be solved in C?

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• two threads going to do func()

  - by nisnis84

  2 threads going to use the same func(). The 2 threads should be mutually exclusive. How do I get it to work properly? (output should be "abcdeabcde") char arr[] = "ABCDE"; int len = 5; void func(){ for(int i = 0; i <len;i++) printf("%c,arr[i]); }

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• Stringified template argument

  - by pythonic metaphor

  Is it possible to get a stringified version of a template argument name? Something like this, if only we were running the preprocessor: template <typename T> struct Named{ const char* name(){ return "Named<" #T ">"; } };

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• Printing values of all fields in C++ structure

  - by Zhinkaas

  Say a simple structure struct abc { int a; char b; } I got some value in a variable defined as its structure and now I want to print below a = [some value] b = [some character] What is the best way to achieve this for an arbitrary structure without having to write a dump...(...) function for each of the structure I encounter?

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• Can AutoCAD entities be serialized?

  - by billmuell

  Using ObjectARX (C++) for AutoCAD 2010, can AutoCAD entities be serialized? We need to save the serialized entity in a field in a database (Oracle, PostgreSQL, etc., not AcDbDatabase). It'OK if you show me how to save them in disk, something like this: AcDbEntity * entity; ... std::ofstream ofs("c:\\filename.fil", std::ios::binary); ofs.write((char *)(entity), sizeof(entity)); ofs.close(); Thanks

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• Subscript text in pdf C#

  - by daft

  How do I insert a subscript charachter in a string in C#? I have nor problems appending a superscript 2 in the same string using char.ConvertFromUtf32(178);, but I struggle with finding a similar solution for the subscripted text. Actually, I'm struggling with finding ANY solution at all to this rather embarrassing issue. :)

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• HOw to use fadeIn and FadeOut in Jquery image chnage

  - by Mirage

  I am chnaging the image src onClick event like below IF the hyperlink is clicked then i need to change the image in a div box <div id="left_img"> <img style="float: right;" src="/image/char.gif"> </div> Jquery $("#left_img").attr("src","http://www.abc.net/image/2_char.gif"); Now i want that instead of abrupt change of image there should fade out of old image and fadein of new image How can i do that

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• question about charAt function

  - by davit-datuashvili

  i know java API function charAt for example String s="dato" char r=s.charAt(0); r is equal d but my question is how realy it works or what function can i use instead of charAt function to get same result? thanks

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• What happens in memory when calling a function with literal values?

  - by Drise

  Suppose I have an arbitrary function: void someFunc(int, double, char); and I call someFunc(8, 2.4, 'a');, what actually happens? How does 8, 2.4, and 'a' get memory, moved into that memory, and passed into the function? What type of optimizations does the compiler have for situations like these? What if I mix and match parameters, such like someFunc(myIntVar, 2.4, someChar);? What happens if the function is declared as inline?

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• SQL SERVER 2005 Self Joins output

  - by user301751

  HI I am looking for some help I just can't seem to get my head how self joins work. I have this sql code select Persno'Name',convert(char(20), A_Date , 13)'Logins',acode from atrail as LOGIN where acode = 'LOGIN' OR acode = 'LOGOUT' order by a_date desc Which produces a list of User names and when the have logged in and out. What I am trying to acheive is to get anther column with the LOGOUT date next to the date they logged in date so that it is easyer to see when they logged in and out. Thanks Andy

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• How to run multiple arguments in Cygwin

  - by danutenshu

  I've been trying to run a program that will invert the order of a string and to run it, I have to type a second argument in prompt. int main(int argc, char* argv[]) { string text = argv[2]; for (int num=text.size(); num>./0; num--) { cout << text.at(num); } return 0; } e.g. ./program lorem result: merol

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• C++ printf: newline (\n) from commandline argument

  - by Sebtm

  How print format string passed as argument ? example.cpp: #include <iostream> int main(int ac, char* av[]) { printf(av[1],"anything"); return 0; } try: example.exe "print this\non newline" output is: print this\non newline instead I want: print this on newline

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• Easy way to convert a string of 0's and 1's into a character? C language

  - by Nick

  I'm doing a steganography project where I read in bytes from a ppm file and add the least significant bit to an array. So once 8 bytes are read in, I would have 8 bits in my array, which should equal some character in a hidden message. Is there an easy way to convert an array of 0's and 1's into an ascii value? For example, the array: char bits[] = "0,1,1,1,0,1,0,0" would equal 't'.

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• Is there any difference between BOOL and Boolean in Objective-C?

  - by Frost Li

  I know BOOL is actually a typedef of signed char. But what about Boolean? I am confused of bool, Boolean and BOOL.... Q Q

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• how to implement the string handling functions. is it necesary to imclude any libraries. give exampl

  - by thulasi

  main() { char a,b a='A'; b='B'; strcat(b,a); prontf("a:%s b:%s",a,b); }

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• initialize array to 0 in C

  - by Claudiu

  I need a big null array in C as a global. Is there any way to do this besides typing out char ZEROARRAY[1024] = {0, 0, 0, /* ... 1021 more times... */ }; ?

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• Why can't your switch statement data type be long Java?

  - by Fostah

  Here's an excerpt from Sun's Java tutorials: A switch works with the byte, short, char, and int primitive data types. It also works with enumerated types (discussed in Classes and Inheritance) and a few special classes that "wrap" certain primitive types: Character, Byte, Short, and Integer (discussed in Simple Data Objects ). There must be a good reason why the long primitive data type is not allowed. Anyone know what it is?

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• How to remove these warning when erasing a c string

  - by nunos

  How can I remove these warnings? char foo[10]; int k; for (k = 0; foo[k] != NULL; k++) //comparison between pointer and integer msg2[k] = NULL; //assignment makes integer from pointer without a cast Thanks.

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• How to Concatenate 2 C strings, without overwriting any terminating Null characters?

  - by Ben313

  Hello, I am trying to set up a list of file names for a parameter to SHFileOperation. I want to be able to concatenate a file name onto the char array, but i dont want to get rid of the terminating character. for example, I want this: C:\...\0E:\...\0F:\...\0\0 when i use strcat(), it overwrites the null, so it looks like C:\...E:\...F:\...0\ Is there any easy way to do this? or am i going to have to code a new strcat for myself?

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• How I return the size of the pointer that I have allocate with malloc?

  - by drigoSkalWalker

  See this example! int main( int argc, char ** argv ) { int *ptr = malloc(100 * sizeof (int)); printf("sizeof(array) is %d bytes\n", sizeof(ptr)); } The printf function return only 4 bytes! What is wrong? Thanks so much!!!

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• How NOT to skip BOM info (FF FE) when using fread or ifstream?

  - by al_lea

  I'm trying to use fread/ifstream to read the first 2 bytes of a .csv with BOM info. But following code always skips the first two bytes (which are 'FF FE'): ifstream is; is.open (fn, ios::binary ); char buf[2]; is.read(buf, 2); is.close(); using FILE*/fread does no better.

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