第十七周项目4-日期结构体（1）

/*
*Copyright (c)2014,烟台大学计算机与控制工程学院
*All rights reserved.
*文件名称：days.cpp
*作    者：梁璨
*完成日期：2014年12月22日
*版 本 号：v1.0
*
*问题描述：；
*程序输入：；
*程序输出：；
*/

#include <iostream>

using namespace std;

struct Date
{
int year;
int month;
int day;
};

int main()
{
Date date;
cout<<"input year,month,day:";
cin>>date.year>>date.month>>date.day;
int days;
int a=31,b=30,c;
if((date.year%4==0&&date.year%100!=0)||(date.year%400==0))
c=29;
else
c=28;
switch(date.month)
{
case 1:
days=date.day;
break;
case 2:
days=date.day+a;
break;
case 3:
days=date.day+a+c;
break;
case 4:
days=date.day+2*a+c;
break;
case 5:
days=date.day+2*a+c+b;
break;
case 6:
days=date.day+3*a+c+b;
break;
case 7:
days=date.day+3*a+c+2*b;
break;
case 8:
days=date.day+4*a+c+2*b;
break;
case 9:
days=date.day+5*a+c+2*b;
break;
case 10:
days=date.day+5*a+c+3*b;
break;
case 11:
days=date.day+6*a+c+3*b;
break;
case 12:
days=date.day+6*a+c+4*b;
break;
}
cout<<date.month<<"月"<<date.day<<"日是"<<date.year<<"年的第"<<days<<"天."<<endl;
return 0;
}