1 #include<stdio.h>
2 int main()
3 {
4 int year,month;
5 printf("请输入年和月：\n");
6 scanf("%d%d",&year,&month);
7 if(year%4==0&&year%100!=0||year%400==0)
8 switch(month)
9 {
10 case 1:
11 case 3:
12 case 5:
13 case 7:
14 case 8:
15 case 10:
16 case 12:printf("该月有31天\n");break;
17 case 2:printf("该月有29天\n");break;
18 case 4:
19 case 6:
20 case 9:
21 case 11:printf("该月有30天\n");break;
22 }
23 else
24 switch(month)
25 {
26 case 1:
27 case 3:
28 case 5:
29 case 7:
30 case 8:
31 case 10:
32 case 12:printf("该月有31天\n");break;
33 case 2:printf("该月有28天\n");break;
34 case 4:
35 case 6:
36 case 9:
37 case 11:printf("该月有30天\n");break;
38 }
39 return 0;
40 }
