一个简单的程序不知道哪里错了
#include "stdio.h"
void main()
{
int day,month,year,sum,leap;
printf("plaese input year,month,day\n");
scanf("%d,%d,%d",&year,&month,&day);
switch(month)
{
case 1:sum=0;break;
case 2:sum=31;break;
case 3:sum=59;break;
case 4:sum=90;break;
case 5:sum=120;break;
case 6:sum=151;break;
case 7:sum=181;break;
case 8:sum=212;break;
case 9:sum=243;break;
case 10:sum=273;break;
case 11:sum=304;break;
case 12:sum=334;break;
default:printf("data error");break;
}
sum=sum+day;
if(yaer%400==0||(year%4==0 && yaer%100!=0))
leap=1;
else
leap=0;
if(leap==1&&mouth>2)
sum++;
printf("it is the %dth day",sum);
}