Files and Structures

[angjacob]

The input file, p5in.txt, contains the following records:

76606 68 80 88 74
72049 89 95 93 97
73338 70 89 95 99
71836 57 51 65 64
75739 64 67 71 76
79281 91 91 87 97
79741 83 87 73 88
77578 94 86 54 66
74366 77 54 70 50
76166 68 95 58 68

Each record contains the student id and the result of 4 exams.

II. Assume that the maximum class size is 20. You are going to read the input file into an array of structure to produce two files:

1) The first file (LAST_F.I._final1.txt) will be similar to the following:

Produced by (Your Name)
ID Exam 1 Exam 2 Exam 3 Exam 4 Average Grade
76606 68 80 88 74 77 C
72049 89 95 93 97 93 A
73338 70 89 95 99 88 B
71836 57 51 65 64 59 F
75739 64 67 71 76 69 F
79281 91 91 87 97 91 B
79741 83 87 73 88 82 C
77578 94 86 54 66 75 C
74366 77 54 70 50 62 F
76166 68 95 58 68 72 F

The average is the average score of the 4 exams. Use DTCC grading system for grade where A is > 91, B is > 82, C is >74 and F is <75;

2) The second file will be the same as above except it is sorted on ID in ascending order.
Name this file (LAST_F.I._final2.txt).
III. Your main function should contain only the following statements:

int _tmain(int argc, _TCHAR* argv[])
{
totalStudent = readFile();
writeFile("LAST_FI_final1.txt", totalStudent);
sort(totalStudent);
writeFile("LAST_FI_final2.txt", totalStudent);
return 0;
}
You should also have a function called assignGrade called inside readFile();

I don't even know where to begin

So far I have:

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>

using namespace std;

struct student
{
int id;
int ex1;
int ex2;
int ex3;
int ex4;
int average;
char grade;
};

student studentnum[20];



int _tmain(int argc, _TCHAR* argv[])
{
//teacher said this had to be in the main I have no idea what to do with it.
totalStudent = readFile();
writeFile("LAST_FI_final1.txt", totalStudent);
sort(totalStudent);
writeFile("LAST_FI_final2.txt", totalStudent);
return 0;
}

char assigngrade(int average)
{
if (average < 75)
return 'F';
else if (average >= 75 && average < 82)
return 'C';
else if (average >= 82 && average < 91)
return 'B';
else
return 'A';
}

I am super new to programming, and I do not know a lot. Please be gentle.

[wildblue]

//teacher said this had to be in the main I have no idea what to do with it.
totalStudent = readFile();

Sounds like totalStudent is an array of student structs that you'll return from the readFile() function.