I have a problem. I got my file to open but I don't know how to modify the file and have the output I need. Here is my code so far

#include <fstream>
#include <iostream>
#include <cstdlib>

int main()
{
    using namespace std;
    ifstream input;
    ofstream output;

    input.open("input.txt");
    if (input.fail())
    {
        cout<<"Input file opening failed.\n";
        exit(1);
    }

    output.open("grade.txt");
    if (output.fail())
    {
        cout<<"Output file opening failed.\n";
        exit(1);
    }

    input.close();
    output.close();

    return 0;
}

i'm supposed to add the total of scores...average them and have the program tell me who has the highest and lowest averages of the students.

Could you post a brief example of the data files...

I have a problem. I got my file to open but I don't know how to modify the file and have the output I need.

Well, the first thing you have to add is reading the file input.txt.

The input file looks like this:

DAN 100 70 85
JANE 78 82 90
PETER 82 84 91
MINIE 98 100 75
JOSEPH 71 62 100
CHRISTOPHER 91 75 82
BEN 54 84 77

After I read the input file and add everything its supposed to have their total, average, letter grade and show us who has the lowest grade and who has the highest grade.