Question

Using C++. Write a program to input marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer. The input marks must be inserted one subject at a time. The program then calculate percentage and grade according to given conditions:

If percentage >= 90% : Grade A

If percentage >= 80% : Grade B

If percentage >= 70% : Grade C

If percentage >= 60% : Grade D

If percentage >= 40% : Grade E

If percentage < 40% : Grade F

Example1: Please input marks of five subjects.

Physics: 95

Chemistry: 95

Biology: 97

Mathematics: 98

Computer: 90

Percentage = 95.00

Grade A

Example2: Please input marks of five subjects.

Physics: 85

Chemistry: 80

Biology: 95

Mathematics: 98

Computer: 70

Percentage = 85.60

Grade B

Answer 1

#include <iostream>
#include <iomanip>
using namespace std;
int main() {
    int n, sum = 0;
    
    double percentage;
    char grade;
    
   cout<<"Physics: ";
   cin>>n;
   sum += n;
   
   cout<<"Chemistry: ";
   cin>>n;
   sum += n;
   
   cout<<"Biology: ";
   cin>>n;
   sum += n;
   
   cout<<"Mathematics: ";
   cin>>n;
   sum += n;
   
   cout<<"Computer: ";
   cin>>n;
   sum += n;
   
   cout<<fixed<<setprecision(2);
   percentage  = sum/5.0;
   cout<<"Percentage = "<<percentage <<endl;
   
   if(percentage >= 90){
      grade = 'A';
   }
   else if(percentage >= 80){
      grade = 'B';
   }
   else if(percentage >= 70){
      grade = 'C';
   }
   else if(percentage >= 60){
      grade = 'D';
   }
   else if(percentage >= 40){
      grade = 'E';
   }
   else{
      grade = 'F';
   }
   
   cout<<"Grade "<<grade<<endl;
    return 0;
}