main.cpp (DailyC++) 7/19/12

///CODED BY AARGH(cplusplus.com)
/// http://www.cplusplus.com/forum/beginner/75558/
#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    char* data = "text.txt"; //use to open a text file
    char student_info[50]; //holds student ID
    char student_answers[20]; //stores students' answers
    char answers[20]; //holds correct answers and used to compare with students' answers
    double score = 0; //counts the students' score
    const double max_score = 40; //sets the max score possible and used for calculations
    char grade; //stores a letter grade used for output

    ifstream in(data); //text.txt must be present in same folder as this ccp file or program will not run correctly or crash.
    in >> answers;
    cout << "Processing student Data;" << "  " << answers << " = Correct answers.\n";

    while (in >> student_info)
    {
        in.get();
        in.getline(student_answers, 21);
        for (int i = 0; i < 20; i++)
        {
            if (student_answers[i] == answers[i])
                score += 2;
            else if (student_answers[i] == ' ')
                ;
            else
                --score;
        }
        double grade_scale = score / max_score * 100;
        if (grade_scale > 89)
            grade = 'A';
        else if (grade_scale > 79 && grade_scale < 90)
            grade = 'B';
        else if (grade_scale > 69 && grade_scale < 80)
            grade = 'C';
        else if (grade_scale > 59 && grade_scale < 70)
            grade = 'D';
        else if (grade_scale > -40 && grade_scale < 60)
            grade = 'F';
        cout << endl << student_info << "\t" << student_answers << "\t" << score << " " << grade_scale << "% " << grade << endl;
        score = 0;
    }
    char p; // used for gracefully exiting program
    cout << "\nDone.  Press enter key to quit."; //trying to stay platform-independant
    cin.get(p);



    return 0;
}