date.cpp

具体的日期的计算

//////////////////////////////////////////////////////////////////////////////////
////////file: Date.cpp

#include <iostream.h>

void Date(int y, int m, int d);

void main()
{
	cout<<"Please input a positive int standed for the year:"<<endl;
	int year;
	cin>>year;
    cout<<"Please input a int standed for the month between 0 and 12:"<<endl;
	int month;
	cin>>month;
	cout<<"Please input a int standed for the date of the right scope due to the different month:"<<endl;
	int day;
	cin>>day;
	Date(year, month, day);
}
void Date(int y, int m, int d)
{
	int year=y;
	int month=m;
	int day=d;
	int date=0;
	if((year%4)!=0)
	{
		switch (month)
		{
		case 1: case 2:
			date=(month-1)*31+day;
			cout<<"the date is:"<<date<<endl;
			break;
		case 3: case 4: case 5: case 6: case 7: case 8:
			date=(month/2)*31+((month-3)/2)*30+28+day;
			cout<<"the date is:"<<date<<endl;
			break;
		case 9: case 10: case 11: case 12:
			date=((month+1)/2)*31+((month-4)/2)*30+28+day;
			cout<<"the date is:"<<date<<endl;
			break;
		default:
			cout<<"error!"<<endl;
		}
	}
    else
	{
		switch (month)
		{
		case 1: case 2:
			date=(month-1)*31+day;
			cout<<"the date is:"<<date<<endl;
			break;
		case 3: case 4: case 5: case 6: case 7: case 8:
			date=(month/2)*31+((month-3)/2)*30+29+day;
			cout<<"the date is:"<<date<<endl;
			break;
		case 9: case 10: case 11: case 12:
			date=((month+1)/2)*31+((month-4)/2)*30+29+day;
			cout<<"the date is:"<<date<<endl;
			break;
		default:
			cout<<"error!"<<endl;
		}
	}
}