Question

Using C++ Program develop any application that reads marks obtained by a student in a test of 100. Marks and computes his grade according to the following criteria.
Marks>=80 grade=A
Marks>=70 & <80 grade=B
Marks>=60 & <70 grade=C
Marks>=50 & <60 grade=D
otherwise grade=F

Answer 1

#include <iostream>
using namespace std;
int main(){
    cout<<"Input marks: ";
    int marks; cin>>marks;
    char grade;
    switch(marks/10){
        case 10:;
        case 9:;
        case 8: grade = 'A'; break;
        case 7: grade = 'B'; break;
        case 6: grade = 'C'; break;
        case 5: grade = 'D'; break;
        default: grade = 'F';
    }
    cout<<"Grade: "<<grade;
}