//case后面改成数值，不是字符;include<iostream> using namespace std;void main(){int month;cout<<"input a month between 1--12:";cin>>month;switch(month){ case 1:cout<<"January 31days\n";break;case 2:cout<<"February 28or29days\n";break;case 3:cout<<"March 31days\n";...
解析 解析见答案#includeintmain(){intx,days;printf("输入月份:");scanf("%d",&x);switch(x){case1:case3:case5:case7:case8:case10:case12:days=31;break;case4:case6:case9:case11:days=30;break;case2:days=28;break;printf"该月有%d天\n",days);return0;} ...
(“优秀\n”);break;case 8:printf(“良好\n”);break;case 7:printf(“中\n”);break;case 6: printf(“及格\n”);break; case 5:case 4:case 3:case 2:case 1:case 0:printf(“不及格\n”);break; default:printf(“输入数据有误”);}} 3.编程:输入月份输出每月有多少天(不考虑闰年情况)...