#include<stdio.h>
#include<conio.h>
#include<iostream.h>
void main()
{
int m;
clrscr();
cout<<"Enter mark = ";
cin>>m;
if(m>100)
cout<<"Please enter mark less than or equal to 100.";
else if(m>=80 && m<=100)
cout<<"5.00(A+)";
else if(m>=70 && m<80)
cout<<"4.00(A)";
else if(m>=60 && m<70)
cout<<"3.50(A-)";
else if(m>=50 && m<60)
cout<<"3.00(B)";
else if(m>=40 && m<50)
cout<<"2.00(C)";
else if(m>=33 && m<40)
cout<<"1.00(D)";
else if(m<33)
cout<<"F";
getch();
}
///////////////////////////////////////////////////////////////////////////
Copy & paste this code in your TC & run, then you will get output.......
If you have any problem please comment below.........