2009\1

31

#include
int main()
{
int y,m,d;
scanf("%d\\%d",&y,&m);
switch(m)
{case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:d=31;break;
case 4:
case 6:
case 9:
case 11:d=30;break;
case 2:
if((y%4==0&&y0!=0)||y@0==0)
d=29;
else
d=28;
}
printf("%d\n",d);
return 0;
}
或者

#include
int main()
{
int y,m,d;
scanf("%d\\%d",&y,&m);
switch(m)
{
case 1:printf("%d\n",31);break;
case 3:printf("%d\n",31);break;
case 5:printf("%d\n",31);break;
case 7:printf("%d\n",31);break;
case 8:printf("%d\n",31);break;
case 10:printf("%d\n",31);break;
case 12:printf("%d\n",31);break;
case 4:printf("%d\n",30);break;
case 6:printf("%d\n",30);break;
case 9:printf("%d\n",30);break;
case 11:printf("%d\n",30);break;
case 2:
if((y%4==0&&y0!=0)||(y@0==0)) printf("%d\n",29);
else printf("%d\n",28);
break;
}
return 0;
}