c言語入力年月日、出力本年何日目

#include 


int main()
{
   int year,month,day;//   
   int i;
   int sum = 0;//    
   int date[12]={31,29,31,30,31,30,31,31,30,31,30,31};
   printf("     ：");
   scanf("%d %d %d",&year,&month,&day);
   for(i=0;i