用C语言编写的万年历源代码

// w.cpp : Defines the entry point for the console application.
//万年历

#include "stdafx.h"
#include <string.h>
#include <stdlib.h>
#include "stdio.h"


long int f(int year,int month)
{/*f(年，月)＝年－1，如月<3;否则，f(年，月)＝年*/
    if(month<3) return year-1;
    else return year;
}

long int g(int month)
{/*g(月)＝月＋13，如月<3;否则，g(月)＝月＋1*/
    if(month<3) return month+13;
    else return month+1;
}

long int n(int year,int month,int day)
{
  /*N=1461*f(年、月)/4+153*g(月)/5+日*/
    return 1461L*f(year,month)/4+153L*g(month)/5+day;
}

int w(int year,int month,int day)
{
  /*w=(N-621049)%7(0<=w<7)*/