Grades

#include <iostream>
using namespace std;
int main()
{
    int x;
char y;
cout << "Enter your average grade:" << endl;
cin >> x;
if (x >= 90)
    y = 'a';
else if (x >= 80)
  y = 'b';
else if (x>= 70)
    y = 'c';
else if (x>= 60)
    y= 'd';
else
    y= 'f';

switch (y) {
    case 'a':
        cout << "Awesome! You did really great, keep doing that." << endl;
        break;
    case 'b':
        cout << "That's fine! You have an improvement chance, go for it!" << endl;
        break;
    case 'c':
        cout << "You passed! That's good, you can do better tho" << endl;
        break;
    case 'd':
            cout << "Oh no! you failed. But you can still get your grades up! " << endl;
            break;
    case 'f':
      cout << "Your grades are really low, try harder! " << endl;
           break;
         }
           return 0;

    }