c——闰年

PTA

 #include<stdio.h>
 int main() {
     int year,month,day,cnt,flag;
     flag = ;
     scanf("%4d/%2d/%2d",&year,&month,&day);
     if((year% == && year% != ) || (year% == ))
         flag = ;
     if(month == )
         cnt = day;
     if(month == )
         cnt =  + day;
     if(month == )
         cnt =  +  + day + flag;
     if(month == )
         cnt =  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  +  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  +  +  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  +  +  +  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  +  +  +  +  +  +  + day + flag;
     if(month == )
         cnt =  +  +  +  +  +  +  +  +  +  +  + day + flag;
     printf("%d",cnt);
 }

简便的写法，用了数组和循环：

 #include<stdio.h>
 int main() {
     int year,month,day,cnt,flag,i;
     int a[] = {,,,,,,,,,,,};
     flag = ;
     scanf("%4d/%2d/%2d",&year,&month,&day);
     if((year% == && year% != ) || (year% == ))
         flag = ;
     for(i = ; i < month; i++)
         cnt = cnt + a[i];
     cnt = cnt + day;
     if(month >  && flag ==)
         cnt++;
     printf("%d",cnt);
 }