#include <stdio.h>
int main(int argc, const char * argv[]){
int vize;
    int final;
    int ortalama;

    printf("Vize Notunu Giriniz: ");
    scanf("%d", &vize);

    printf("Final Notunu Giriniz: ");
    scanf("%d", &final);

    ortalama = (vize * 0.3) + (final * 0.7);

    printf("Ortalamanız: %d\n", ortalama);

    int not = ortalama;

// switch-case yapısı
    switch(not) {
case 0 ... 49:
printf("FF");
            break;
        case 50 ... 59:
printf("DD");
            break;
        case 60 ... 64:
printf("DC");
            break;
        case 65 ... 69:
printf("CC");
            break;
        case 70 ... 74:
printf("CB");
            break;
        case 75 ... 79:
printf("BB");
            break;
        case 80 ... 84:
printf("AB");
            break;
        default:
printf("AA");
    }

return 0;
}