i wanna out put the maximum minimum and
average score as a statistic category under the student ids and grades in the output file. how do i do that?
here is the code:
#include "stdafx.h"
#include <iostream>
#include <string>
#include <fstream>
#include <assert.h>
using namespace std;
int openfiles(ifstream& infile, ofstream& outfile);
void Size(ofstream&, int, string);
int main()
{
int num_student = 4, count, length, score2, w[6];
ifstream infile, curvingfile; char x;
ofstream outfile; float score;
string key, answer, id;
do {
openfiles(infile, outfile); // function calling
infile >> key; // answer key
for (int i = 0; i < num_student; i++) // loop over each student
{
infile >> id;
infile >> answer;
count = 0;
length = key.size(); // length represents number of questions in exam from exam1.dat
// size is a string function....
Size (outfile, length, answer);
for (int j = 0; j < length; j++) // loop over each question
{
if (key[j] == answer[j])
count++;
}
score = (float) count / length;
score2 = (int)(score * 100);
outfile << id << " " << score2 << "%";
if (score2 >= 90)//<-----w[0]
outfile << "A" << endl;
else if (score2 >= 80)//<-----w[1]
outfile << "B" << endl;
else if (score2 >= 70)//<-----w[2]
outfile << "C" << endl;
else if (score2 >= 60)//<-----w[3]
outfile << "D" << endl;
else if (score2 >= 50)//<-----w[4]
outfile << "E" << endl;
else if (score2 < 50)//<-----w[5]
outfile << "F" << endl;
}
cout << "Would you like to attempt a new trial? (y/n): ";
cin >> x;
} while (x == 'y' || x == 'Y');
return 0;
}
int openfiles(ifstream& infile, ofstream& outfile)
{
string name1, name2, name3, answerstring, curvedata;
cin >> name1; name2; name3;
if (name1 == "exit" || name2 == "exit" || name3 == "exit" ) return false;
cout << "Input the name for the exam file: ";
cin >> name1;
infile.open(name1.c_str());
infile >> answerstring;
cout << "Input the name for the curving file: ";
cin >> name2;
infile.open(name2.c_str());
infile >> curvedata;
cout << "Input the name for the output: ";
cin >> name3;
outfile.open(name3.c_str());
return true;
}
void Size(ofstream& outfile, int length, string answer)
{
bool check;// extra answers, lesser answers...
if (answer.size() > length)
{
outfile << "Unnecessary extra answers";
}
else if (answer.size() < length)
{
outfile << "The remaining answers are incorrect";
}
else { check = false; };
}
and how do i use assert for preconditions and post conditional functions? i dont understand this that well...
