帮你修改了下，应该没错了，
#include
int main()
{
int year;
int month;
int day,days=0; //
int i;
int date[12][13] = {
{31,28,31,30,31,30,31,31,30,31,30,31},
{31,29,31,30,31,30,31,31,30,31,30,31}};
printf("请输入当天的日期:");
scanf("%d %d %d",&year,&month,&day);
if((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
{
for(i=0;i
{
days += date[1][i]; //
}
}
else
{
for(i=0;i
{
days += date[0][i]; //
}
}
days += day;
printf("今天是今天的第%d天\n",days);
return 0;
}
