Maximum PC

  fs.open("tests.dat");
  while (!fs.eof())
    {
      for (int i=0; i<20; i++)
        {
          fs >> studentAnswer[i];
          if (answerKey[i] == studentAnswer[i])
            studentResult[i] = true;
          else
            studentResult[i] = false;
        }
      printResults(studentResult);
    }

B B A A C B B A D C B C D A D C C B B C
B D A A C A B A C D B C D A D C C B D A
B B A A C C B A C D B C D A C C C B D A
A B A A C A A A C C B C D A C C C B D A
A B C D A B C D A B C D A B C D A B C D
B D A A C A A A C D B C D A D C C B D A
B D A A C A B A D C B C D A D C C B D A

while (!CONDITION) {
...
}

do {
...
} until (CONDITION)

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <assert.h>

using namespace std;

void readFileMethod1();

int main(void) {

    char key;
   
    readFileMethod1();
   
    cout << "q for exit";
    cin >> key;

    return EXIT_SUCCESS;
}

void readFileMethod1()
{
    ifstream indata;
    char val;
    int cnt = 0;
   
    indata.open("tests.dat");
    if(!indata) {
        cout << "Error: file could not be opened" << endl;
        return;
    }
   
    indata >> val;
    while ( !indata.eof() ) {
        cnt++;
        indata >> val;
    }
    indata.close();

    cout << "End-of-file reached... " << cnt << endl;
}

#include <string>
#include <fstream>
#include <vector>
#include <iostream>
#include <cassert>

using namespace std;

int main()
{
    vector<string> text_file;
    char key;

    ifstream ifs( "tests.dat" );
    string temp;

    if(ifs.fail())
    {
        cerr<<"\nThe file could not be opened.";
        return -1;
    }

    cout << "\nContents of file as read in:\n";
    while( getline(ifs, temp ) )
    {
        cout << temp << endl;
        text_file.push_back( temp );
    }

    cout << "\n\nContents of vector:\n";

    for (int i=0; i<text_file.size(); i++)
    {
        cout << text_file[i] << endl;
    }

    cin >> key;
}

void foo (int n)
{
  for (int i = 0; i < n; i++);
  cout << i << endl;  //prints i = n despite not being in scope
}