WAP C++ to store marks of subject each out of 100. obtained by a student caalculate his or her total marks percentage and grade accoriding to following criteria .

per >=80      grade -A

65<=per<80   grade-B

55<=per<65    grade-c

50<=per<55     grade-d

per<50            FAIL

#include <iostream>

using namespace std;

int main()
{
    float m1,m2,m3,m4,m5,per,total;
    cout<<"enter the marks of 5 subjects:-";
    cin>>m1>>m2>>m3>>m4>>m5;
    total=m1+m2+m3+m4+m5;
    per=(total*100)/500;
   cout<<"total="<<total;
   if(per>=80){
   cout<<"\ngrade - A";
   cout<<"\npercentage:-"<<per;
   }
    else
    if(per>=65&&per<80){
    cout<<"\ngrade - B";
    cout<<"\npercentage:-"<<per;
    }
    else
     if(per>=55&&per<65)
     {
    cout<<"\ngrade - C";
    cout<<"\npercentage:-"<<per;
     }
   else
    if(per>=50&&per<55)
    {
    cout<<"\ngrade - D";
    cout<<"\npercentage:-"<<per;
    }
    else{
    cout<<"\nFAIL";
    cout<<"\npercentage:-"<<per;
    }
    return 0;
}

Output:-

enter the marks of 5 subjects:-80

70

65

82

72

total=369

grade - B

percentage:-73.8