grades.cpp

/*
Write a program to calculate marks to grades .Follow the conversion rule as given below:

100 - 90 : A+
90 - 80 : A
80 - 70 : B+
70 - 60 : B
60 - 50 : C
50 - 40 : D
40 - 30 : E
30 - 0 : F

Sample Input : Enter your marks : 98
Sample Output : Your Grade is A+
*/

#include<iostream>
using namespace std;
int main(){

    int marks;
    cout<<"Enter the marks  : ";
    cin>>marks;

    if(marks>=91 && marks <=100){
        cout<<"Your Grade is A+";
    }else if(marks>=81 && marks <=90){
        cout<<"Your Grade is A";
    }else if(marks>=71 && marks <=80){
        cout<<"Your Grade is B+";
    }else if(marks>=61 && marks <=70){
        cout<<"Your Grade is B";
    }else if(marks>=51 && marks <=60){
        cout<<"Your Grade is C";
    }else if(marks>=41 && marks <=50){
        cout<<"Your Grade is D";
    }else if(marks>=31 && marks <=40){
        cout<<"Your Grade is E";
    }else if(marks<=30 && marks >=0){
        cout<<"Your Grade is F";
    }else{
        cout<<"Not a valid marks";
    }
}