用switch语句为输入的成绩分等级
#include <>
main(){
int grades;
printf("请输入分数：");
scanf("%d",&grades);
switch(grades/10){
case 10:
case 9:printf("成绩等级A");break;
case 8:printf("成绩等级B"); break;
case 7:printf("成绩等级C"); break;
case 6:printf("成绩等级D"); break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:printf("成绩不合格"); break;
default:printf("输入内容有误");break;
}
}