C++第1周项目2——日期结构体

/*
* 程序的版权和版本声明部分
* Copyright (c)2013, 烟台大学计算机学院学生
* All rightsreserved.
* 文件名称： date.cpp                           
* 作    者：                            
* 完成日期：  年  月   日
* 版本号： v1.0      
* 输入描述：年月日
* 问题描述：输出对应的那一天是这一年的第几天
* 输出：第几天
*/
#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;


	cout<<date.month<<"月"<<date.day<<"日是"<<date.year<<"年的第"<<days<<"天."<<endl;
	return 0;
}

#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;
	switch(date.month)
	{
	case 1: days=date.day;      break;
    case 2: days=date.day+31;   break;
    case 3: days=date.day+59;   break;
    case 4: days=date.day+90;   break;
    case 5: days=date.day+120;  break;
    case 6: days=date.day+151;  break;
    case 7: days=date.day+181;  break;
    case 8: days=date.day+212;  break;
    case 9: days=date.day+243;  break;
    case 10: days=date.day+273; break;
    case 11: days=date.day+304; break;
    case 12: days=date.day+334; break;
	}
	if ((date.year %4== 0 && date.year % 100 != 0
		||date.year % 400 == 0) && date.month >=3)
		days+=1;
	cout<<date.month<<"月"<<date.day<<"日是"<<date.year<<"年的第"<<days
		<<"天."<<endl;
	return 0;
}

#include <iostream>
using namespace std;
struct Date
{
	int year;
	int month;
	int day;
};
int d[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int main()
{
	Date date;
	cout<<"input year,month,day:";
	cin>>date.year>>date.month>>date.day;
	int days=0,i;
	for(i=1;i<date.month;++i)
		days+=d[i];		//当月之前的天数
	days+=date.day;		//加上本月天数
	if ((date.year %4== 0 && date.year % 100 != 0
		||date.year % 400 == 0) && date.month >=3)
		days+=1;		//闰年的2月要加1天
	cout<<date.month<<"月"<<date.day<<"日是"<<date.year<<"年的第"<<days
		<<"天."<<endl;
	return 0;
}

#include <iostream>
using namespace std;
struct Date
{
	int year;
	int month;
	int day;
};
int d[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int days(int,int,int);
int main()
{
	Date date;
	cout<<"input year,month,day:";
	cin>>date.year>>date.month>>date.day;
	cout<<date.month<<"月"<<date.day<<"日是"<<date.year<<"年的第";
	cout<<days(date.year,date.month,date.day)<<"天."<<endl;
	return 0;
}

int days(int yy,int mm,int dd)
{
    int n=0,i;
	for(i=1;i<mm;++i)
		n+=d[i];		//当月之前的天数
	n+=dd;		//加上本月天数
	if ((yy %4== 0 && yy % 100 != 0
		||yy % 400 == 0) && mm >=3)
		n+=1;		//闰年的2月要加1天
		return n;
}

#include <iostream>
using namespace std;
struct Date
{
	int year;
	int month;
	int day;
};
int d[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int days(Date);
int main()
{
	Date date;
	cout<<"input year,month,day:";
	cin>>date.year>>date.month>>date.day;
	cout<<date.month<<"月"<<date.day<<"日是"<<date.year<<"年的第";
	cout<<days(date)<<"天."<<endl;
	return 0;
}

int days(Date ymd)
{
    int n=0,i;
	for(i=1;i<ymd.month;++i)
		n+=d[i];		//当月之前的天数
	n+=ymd.day;		//加上本月天数
	if ((ymd.year %4== 0 && ymd.year % 100 != 0
		||ymd.year % 400 == 0) && ymd.month >=3)
		n+=1;		//闰年的2月要加1天
		return n;
}