1 #include<stdio.h>
2 #include<stdlib.h>
3 //判断指定的某年某月有多少天
4 void main()
5 {
6 int year,month;
7 int leap,days;
8 printf("please input a year ,month\n");
9 scanf("%d-%d",&year,&month);
10 if((year%4==0)&&(year%100!=0)||((year%4==0)&&(year%100==0)&&(year%400==0)))
11 leap = 1;
12 else
13 leap = 0;
14 switch(month)
15 {
16 case 1:
17 case 3:
18 case 5:
19 case 7:
20 case 8:
21 case 10:
22 case 12: days = 31;break;
23 case 4:
24 case 6:
25 case 9:
26 case 11: days = 30;break;
27 case 2: days = 28 + leap;break;
28 default :days = 0;
29
30 }
31 if(days == 0)
32 printf("input error!\n");
33 else
34 printf("%d\n",days);
35 }
