c语言实现万年历包含农历

实现万年历需要考虑到公历和农历的转换。以下是一个使用C语言实现的万年历代码，包含农历：

#include <stdio.h>

int monthDays[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; //每月天数（不含闰月）
char *months[13] = {" ","一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"}; //每月名称
char *weekDays[7] = {"日","一","二","三","四","五","六"}; //每周名称

int lunarYear(int year) //判断是否为闰年
{
    if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
        return 1;
    else
        return 0;
}

int yearDays(int year) //计算公历一年的天数
{
    if (lunarYear(year))
        return 366;
    else
        return 365;
}

int monthDaysLunar(int year, int month) //计算农历每月天数
{
    int leapMonth = ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) ? 0 : 1; //判断是否有闰月
    int lunarMonthDays[13] = {0,29,30,29,30,29,30,29,30,29,30,29,30}; //每月天数（包含闰月）
    if (leapMonth) //若有闰月
    {
        if (month > leapMonth) //若查询的月份在闰月之后
            month++; //月份需要加1
    }
    return lunarMonthDays[month]; //返回该月天数
}

int lunarYearDays(int year) //计算农历一年的天数
{
    int days = 0;
    for (int i=1; i<=12; i++)
        days += monthDaysLunar(year, i);
    return days;
}

int lunarMonthDays(int year, int month) //计算农历某个月的天数
{
    int days = 0;
    for (int i=1; i<=month; i++)
        days += monthDaysLunar(year, i);
    return days - monthDaysLunar(year, month) + 1;
}

int weekDay(int year, int month, int day) //计算公历某天是星期几
{
    if (month == 1 || month == 2)
    {
        month += 12;
        year--;
    }
    int century = year / 100;
    year %= 100;
    int week = year + year/4 + century/4 - 2*century + 26*(month+1)/10 + day - 1;
    return (week+7) % 7;
}

void printHeader(int year, int month) //打印日历头部
{
    printf("%d年 %s\n", year, months[month]);
    for (int i=0; i<7; i++)
    {
        printf("%s ", weekDays[i]);
    }
    printf("\n");
}

void printCalendar(int year, int month) //打印公历日历
{
    int days = monthDays[month];
    int week = weekDay(year, month, 1);
    int count = 0;
    printHeader(year, month);
    for (int i=0; i<week; i++)
    {
        printf("   ");
        count++;
    }
    for (int i=1; i<=days; i++)
    {
        printf("%2d ", i);
        count++;
        if (count % 7 == 0)
        {
            printf("\n");
        }
    }
    if (count % 7 != 0)
    {
        printf("\n");
    }
}

void printLunar(int year, int month) //打印农历日历
{
    int lunarYearDaysCount = lunarYearDays(year); //计算农历一年的天数
    int lunarMonthDaysCount = lunarMonthDays(year, month); //计算该月天数
    int lunarYearStartWeek = weekDay(year, 1, 1); //计算农历年初一是星期几
    int lunarMonthStartWeek = weekDay(year, month, 1); //计算农历月初一是星期几
    int count = 0;
    printf("农历\n");
    for (int i=0; i<7; i++)
    {
        printf("%s ", weekDays[i]);
    }
    printf("\n");
    for (int i=0; i<lunarYearStartWeek; i++)
    {
        printf("   ");
        count++;
    }
    for (int i=1; i<=lunarYearDaysCount; i++)
    {
        int lunarMonth; //农历月份
        int lunarDay; //农历日份
        int lunarMonthDaysCountTemp; //该月天数的临时变量
        int leapMonth = ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) ? 0 : 1; //判断是否有闰月
        int leapMonthMonth = 0; //闰月的月份
        if (leapMonth) //如果有闰月
            leapMonthMonth = 5; //闰月一般在5月份
        if (i < lunarMonthDaysCountLunar(year, 1)) //计算出农历1月初一对应公历的日期
        {
            lunarMonth = 1;
            lunarDay = i;
        }
        else if (i >= lunarMonthDaysLunar(year, 2) && i < lunarMonthDaysLunar(year, 3)) //计算出农历2月初一对应公历的日期
        {
            if (leapMonth && lunarMonthStartWeek >= 2 && month > leapMonthMonth) //如果有闰月，且该年闰月之后
                lunarMonth = 3;
            else
                lunarMonth = 2;
            lunarDay = i - lunarMonthDaysLunar(year, lunarMonth-1);
        }
        else //计算出农历其他月份初一对应公历的日期
        {
            for (int j=3; j<=12; j++) //从3月份开始计算
            {
                lunarMonthDaysCountTemp = lunarMonthDaysLunar(year, j);
                if (i >= lunarMonthDaysLunar(year, j) && i < lunarMonthDaysLunar(year, j+1))
                {
                    if (leapMonth && lunarMonthStartWeek >= 2 && j > leapMonthMonth) //如果有闰月，且该年闰月之后
                        lunarMonth = j+1;
                    else
                        lunarMonth = j;
                    lunarDay = i - lunarMonthDaysLunar(year, lunarMonth-1);
                    break;
                }
            }
        }
        printf("%2d ", lunarDay);
        count++;
        if (count % 7 == 0)
        {
            printf("\n");
        }
    }
    if (count % 7 != 0)
    {
        printf("\n");
    }
}

int main()
{
    int year, month;
    printf("请输入年份和月份：");
    scanf("%d%d", &year, &month);
    printCalendar(year, month);
    printLunar(year, month);
    return 0;
}

该代码中使用了两个数组，分别存储了公历每月天数和农历每月天数。同时，通过调用函数可以计算出公历某天是星期几，以及农历某个月的天数和某一天的农历日期。最后，通过打印头部和循环打印每一天即可实现万年历的输出。