PROGRAM.

Program to calculate the Grades of student:

#include<iostream>

#include<fstream>

using namespace std;

int main()

{

  ifstream in("marks.txt");

  int i,a=0,b=0,c=0,d=0,f=0,marks;

  for (i=1;i<=50;i++)

  {

in>>marks;

{

if (marks < 50)

{ 

      f=f+1;

}  

     

else if (marks < 60 && marks >= 50)

{ 

      d=d+1;

}

else if (marks < 70 && marks >= 60)

{ 

      c=c+1;

}  

else if (marks<80 && marks>=70)

{

 b=b+1;

}  

else

{

a=a+1;

}

}

  }

  cout<<"GRADES"<<"   "<<"MARKS\n";

  cout<<"  A   "<<"   "<<a<<"\n";

  cout<<"  B   "<<"   "<<b<<"\n";

  cout<<"  C   "<<"   "<<c<<"\n";

  cout<<"  D   "<<"   "<<d<<"\n";

  cout<<"  F   "<<"   "<<f<<"\n";

  return 0;

}