View Code of Problem 81

#include<stdio.h>
int main() { 
int day,month,year,sum,leap; 

scanf("%d %d %d",&year,&month,&day);

switch(month)/*先计算某月以前月份的总天数*/ 

{ 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; 
 } 
sum=sum+day; /*再加上某天的天数*/ 
if(year%400==0||(year%4==0&&year%100!=0))/*判断是不是闰年*/ 
leap=1; 
else 
leap=0; 
if(leap==1&&month>2)/*如果是闰年且月份大于2,总天数应该加一天*/ 
sum++; 
printf("%d\n",sum);

}