c——闰年

 1 #include<stdio.h>
 2 int main() {
 3     int year,month,day,cnt,flag;
 4     flag = 0;
 5     scanf("%4d/%2d/%2d",&year,&month,&day);
 6     if((year%4 ==0 && year%100 != 0) || (year%400 == 0))
 7         flag = 1;
 8     if(month == 1)
 9         cnt = day;
10     if(month == 2)
11         cnt = 31 + day;
12     if(month == 3)
13         cnt = 31 + 28 + day + flag;
14     if(month == 4)
15         cnt = 31 + 28 + 31 + day + flag;
16     if(month == 5)
17         cnt = 31 + 28 + 31 + 30 + day + flag;
18     if(month == 6)
19         cnt = 31 + 28 + 31 + 30 + 31 + day + flag;
20     if(month == 7)
21         cnt = 31 + 28 + 31 + 30 + 31 + 30 + day + flag;
22     if(month == 8)
23         cnt = 31 + 28 + 31 + 30 + 31 + 30 + 31 + day + flag;
24     if(month == 9)
25         cnt = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + day + flag;
26     if(month == 10)
27         cnt = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + day + flag;
28     if(month == 11)
29         cnt = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + day + flag;
30     if(month == 12)
31         cnt = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + day + flag;
32     printf("%d",cnt);
33 }

 1 #include<stdio.h>
 2 int main() {
 3     int year,month,day,cnt,flag,i;
 4     int a[] = {31,28,31,30,31,30,31,31,30,31,30,31};
 5     flag = 0;
 6     scanf("%4d/%2d/%2d",&year,&month,&day);
 7     if((year%4 ==0 && year%100 != 0) || (year%400 == 0))
 8         flag = 1;
 9     for(i = 1; i < month; i++)
10         cnt = cnt + a[i];
11     cnt = cnt + day;
12     if(month > 2 && flag ==1)
13         cnt++;
14     printf("%d",cnt);
15 }