#include <iostream>
using namespace std;
int main()
{
int mark;
cin>> "Enter mark";
cout<< "Your grade";
if (mark <40%){
cout<< "Your grade F ";
}
else if (mark >=40% && mark <45%){
cout<< "Your grade D";
}
else if (mark >=45% && mark <50%){
cout<< "Your grade C";
}
else if (mark >=50% && mark <55%){
cout<< "Your grade C+";
}
else if (mark >=55% && mark <60%){
cout<< "Your grade B-";
}
else if (mark >=60% && mark <65%){
cout<< "Your grade B";
}
else if (mark >=65% && mark <70%){
cout<< "Your grade B+";
} else if (mark >=70% && mark <75%){
cout<< "Your grade A-";
} else if (mark >=75% && mark <80%){
cout<< "Your grade A";
}
else if (mark >=80%){
cout<< "Your grade A+";
}
return 0;
}
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