日历加判断第几周.cpp

日历加判断第几周,请输入一个日期

# include <iostream.h>
void main()
{
int a,b,c,d,e,week,x,y,first,weeks,z;
for(;;)
{
cout<<"请输入一个日期，我将为你判断其是一年中的第几天"<<endl;
cout<<"其中包括2006-2011年的星期的情况"<<endl;
cout<<"年:";
cin>>e;
cout<<"月:";
cin>>a;
if(a>12)                      //状况分析提醒
{
	cout<<"输入出现错误"<<endl;
}
cout<<"日:";
cin>>b;
if(b>31)
{
	cout<<"输入出现错误"<<endl;
}
if(a==1)                 //1月份单独考虑
{
	cout<<"这是一年中的第"<<b<<"天"<<endl;
	x=b;
	y=b;
}
else if(a==2)            //2月份单独考虑
{
	if(b>29)
	{
		cout<<"输入出错"<<endl;
	}
	else
	{
	cout<<"这是一年中的"<<31+b<<"天"<<endl;
	x=31+b;
	y=31+b;
	}
}
else if(a>2)
{
c=30*(a-1);
if(a%2==0)
{
d=a/2;
}
else if(a%2!=0)
{
d=(a-1)/2;
}
if(e%4!=0)                 //判断是否为闰年
{
if(a==9)                   //7月份8月份的情况分开考虑
{
cout<<"这是一年中的第"<<c+d+b-1<<"天"<<endl;
x=c+d+b-1;
cout<<"距年底还有"<<366-c-d-b<<"天"<<endl;
}
else
{
cout<<"这是一年中的第"<<c+d+b-2<<"天"<<endl;
x=c+d+b-2;
cout<<"距年底还有"<<367-c-d-b<<"天"<<endl;
}
}
else if(e%4==0)              //判断是否为闰年
{
    if(a==9)
{
cout<<"这是一年中的第"<<c+d+b<<"天"<<endl;
y=c+d+b;
cout<<"距年底还有"<<366-c-d-b<<"天"<<endl;
}
else
{
cout<<"这是一年中的第"<<c+d+b-1<<"天"<<endl;
y=c+d+b-1;
cout<<"距年底还有"<<367-c-d-b<<"天"<<endl;
}
}                        //else if(e%4==0)的循环终止;
}                        //else if(a>2)的循环终止.
if(e==2006)
	first=0;
if(e==2007)
	first=1;
if(e==2008)
    first=2;
if(e==2009)
    first=4;
if(e==2010)
    first=5;
if(e==2011)
    first=6;
if(e%4!=0)
	week=x%7;
if(e%4==0)
    week=y%7;
	if(week==1)
		weeks=first;
	if(week==2)
	{
		weeks=first+1;
		if(weeks>=7)
			weeks=weeks%7;
	}
	if(week==3)
	{
		weeks=first+2;
		if(weeks>=7)
			weeks=weeks%7;
	}
	if(week==4)
	{
		weeks=first+3;
		if(weeks>=7)
			weeks=weeks%7;
	}
	if(week==5)
	{
		weeks=first+4;
		if(weeks>=7)
			weeks=weeks%7;
	}
	if(week==6)
	{
		weeks=first+5;
		if(weeks>=7)
			weeks=weeks%7;
	}
	if(week==0)
	{
		weeks=first+6;
		if(weeks>=7)
			weeks=weeks%7;
	}
	if(weeks==0)
		cout<<"今天星期日"<<endl;
	else
	cout<<"今天星期"<<weeks<<endl;
if(e%4!=0)
	z=x;
if(e%4==0)
    z=y;
for(int i=1;7*i<z;i++)
{
}
if(weeks<first)   //first=1,2,3,4,5,6的情况,first-saturday算第一周;
cout<<"这一天所在星期为一年中的第"<<i+1<<"个星期"<<endl;
else
cout<<"这一天所在星期为一年中的第"<<i<<"个星期"<<endl;
cout<<endl;
cout<<endl;
cout<<endl;
}
}