1 #include <stdio.h> 2 3 int main() 4 { 5 int grade; 6 scanf_s("%d", &grade); 7 grade = grade / 10; 8 switch (grade) 9 { 10 case 10: 11 case 9:printf("A "); break; 12 case 8:printf("B "); break; 13 case 7:printf("C "); break; 14 case 6:printf("D "); break; 15 default:printf("F ");break; 16 } 17 18 return 0; 19 }