题解 | #计算日期到天数转换#

#include <stdio.h>

int main() {
   int year=0;
   int month=0;
   int day=0;
   int days=0;
   int monthday[12]={31,28,31,30,31,30,31,31,30,31,30,31};
   int i=0;
   scanf("%d %d %d",&year,&month,&day);
   for(i=0;i<month-1;i++)
   {
    days+=monthday[i];
   }//指定月份前的天数相加
   if(month>2)
   {
       if((year%4==0&&year%100!=0)||year%400==0)
     {
     days=day+days+1;//闰年，且月份大于2
     }
       else 
       {
        {
        days=days+day;
        }
       }
   }
   else //1月和2月
   {
    days=days+day;
   }
   printf("%d",days);
    return 0;
}