#include?<stdio.h>

int?main()?

{?

????/*?定義需要計算的日期?*/

????int?year?=?2008;

????int?month?=?8;

????int?day?=?8;

????

????/*

?????*?請使用switch語句，if...else語句完成本題

?????*?如有想看小編思路的，可以點擊左側(cè)任務(wù)中的“不會了怎么辦”

?????*?小編還是希望大家獨立完成哦~

?????*/

????

????int?sum，flag;

????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("您使用的不是公歷");

????????????break;

????}

????

????

????sum?+=?day;?

????

????if((year%4==0?&&?year%100!=0)?||?year%400==0)

????{????

????????flag=1;

????}

????else

????{

????????flag=0;

????}

????

????if(month>2?&&?flag==1)

????{

????????sum++;

????}

????printf("%d年%d月%d日是該年的第%d天",year,month,day,sum?);

????

????return?0;

}