C++程序设计-3.33

蔡勒公式 计算星期

#include<iostream>
#include<algorithm>
#include<string>
#include<ctime>
#include<cstdlib>
#include<cmath>
#include<iomanip>
#include<typeinfo>
#define _CRT_SECURE_NO_WARNINGS
using namespace std;
double distance(double x1, double y1, double x2, double y2)
{
	return sqrt(pow((x1 - x2), 2) + pow((y1 - y2), 2));
}
/*void Switch(int a1, int a2)
{
	int temp;
	temp = a1;
	a1 = a2;
	a2 = temp;
}
void BubbleSort(int a[])
{
	int Number = 3;
	for (int i = 0; i < Number; i++)
		for (int j = i; j < Number; j++)
			if (a[i] > a[j])
			{
				int temp;
				temp = a[j];
				a[j] = a[i];
				a[i] = temp;
			}
}*/


int main()
{
	cout << "Enter year: (e.g., 2012): ";
	int year;
	cin >> year;
	cout << "Enter month : 1-12: ";
	int month;
	cin >> month;
	cout << "Enter the day of the month: 1-31: ";
	int day;
	cin >> day;
	char a[7][10] = { "Saturday","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday" };
	if (month <= 2)
	{
		year -= 1;
		month += 12;
	}
	int h = (day + 26 * (month + 1) / 10 + year % 100 + (year % 100) / 4 + ((year / 100)) / 4 + ((year / 100)) * 5) % 7;
	cout << "Day of the week is " << a[h];
	return 0;
}