HELP with a C++ program reading students grades from an infile and outputing the results to outfile?

I have to write a program the reads students grades together with their test grades. It suppose to compute the average test scores an then assign the appropriate grade. have to use a void function to determine the average for the five test scores and a value returning function to determine and return each students grade. the students grades are on an infile and i have to output it to an outfile.

This is what i have:

#include <iostream>

#include <fstream>

using namespace std;

calculateGrade(float);

int main ()

{

ifstream infile;

infile.open("C:\inGrade.dat");

ofstream outfile;

outfile.open("C:\FinalGrades.txt");

calculateGrade()

infile.close ();

outfile.close ();

system("pause");

return 0;

}

void calculateGrade(string, float)

{

if (average>=90)

outfile<<"A"<<endl;

else if(average>=80)

outfile<<"B"<<endl;

else if (average>=70)

HELP with a C++ program reading students grades from an infile and outputing the results to outfile?visual c++ express

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HELP with a C++ program reading students grades from an infile and outputing the results to outfile?

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