作业3.5

#include<stdio.h>
int main(void)
{
 char ch;
 printf("Enter the level(A B C D E):");
 ch=getchar();
 switch(ch){
 case'A':printf("The level is 90~100\n");break;
 case'B':printf("The level is 80~89\n");break;
 case'C':printf("The level is 70~79\n");break;
 case'D':printf("The level is 60~69\n");break;
 case'E':printf("The level is 0~59\n");break;
 }
 return 0;
}