题目:输入某年某月某日,判断这一天是这一年的第几天?
#include <stdio.h>int main (void)
{
int day,year,month,sum,leap;
printf("please input year,month,day\n");
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=1;
else
leap=0;
if(leap=1&&month>2)
sum+=1;
}
printf("It is the %dth day of %d year.\n",sum,year);
return 0;
}