请教各位老大!

main()
{
int year,month,day,sum,leap;
printf( "please input year month day: ");
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 (year%400==0 || (year%4==0 && year%100==0))
leap = 0;
else
leap = 1;
if (leap=0 && month> 2)
sum++;
printf( "Today is %d day in this year ",sum);
getch();

}
为什么屏幕显示的是
please input year month day:1983 11 25
data errorToday is 14439 day in this year

[解决办法]
scanf( "%d,%d,%d ",&year,&month,&day);
注意你这个输入方式,应该是这样输入:1983,11,25