C语言实现农历查询

C语言实现农历查询可以使用农历算法来计算。以下是一个简单的示例程序，可以输入公历日期，然后输出对应的农历日期。

#include <stdio.h>

// 农历数据，以 1900 年为基准
int lunarInfo[] = { 
    0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2, 
    0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2, 0x095b0, 0x14977, 
    0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 
    0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7, 0x0c950, 
    0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 
    0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950, 0x06aa0, 
    0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0, 
    0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0, 
    0x055b2, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570, 
    0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 
    0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5, 
    0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 
    0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530, 
    0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 
    0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0 
};

// 判断闰年
int isLeapYear(int year) {
    return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
}

// 计算公历到基准日期的天数
int daysFrom1900(int year, int month, int day) {
    int days = 0;
    for (int i = 1900; i < year; i++) {
        days += isLeapYear(i) ? 366 : 365;
    }
    for (int i = 1; i < month; i++) {
        if (i == 2) {
            days += isLeapYear(year) ? 29 : 28;
        } else {
            days += lunarInfo[(year - 1900) * 12 + i - 1] & 0x1f;
        }
    }
    days += day - 1;
    return days;
}

// 计算农历日期
void lunarCalendar(int year, int month, int day) {
    int days = daysFrom1900(year, month, day);

    int lunarYear = 1900;
    int lunarMonth = 1;
    int lunarDay = 1;

    while (days > 0) {
        int monthDays = lunarInfo[(lunarYear - 1900) * 12 + lunarMonth - 1] & 0x1f;
        int leapMonth = lunarInfo[lunarYear - 1900] & 0xf;

        if (lunarMonth == leapMonth + 1 && (lunarInfo[lunarYear - 1900] & 0x100) != 0) {
            monthDays = lunarInfo[(lunarYear - 1900) * 12 + lunarMonth - 1] >> 5;
        }

        if (days < monthDays) {
            break;
        }

        days -= monthDays;
        lunarDay++;
        if (lunarMonth == leapMonth + 1 && lunarDay == (lunarInfo[lunarYear - 1900] >> 20)) {
            lunarDay = 1;
            lunarMonth = leapMonth + 1;
            monthDays = lunarInfo[(lunarYear - 1900) * 12 + lunarMonth - 1] >> 5;
        }
        else if (lunarDay > monthDays) {
            lunarDay = 1;
            lunarMonth++;
            if (lunarMonth > 12) {
                lunarMonth = 1;
                lunarYear++;
            }
            monthDays = lunarInfo[(lunarYear - 1900) * 12 + lunarMonth - 1] & 0x1f;
        }
    }
    printf("%d年%d月%d日是农历%d年%d月%d日\n", year, month, day, lunarYear, lunarMonth, lunarDay);
}

int main() {
    int year, month, day;
    printf("请输入公历日期(格式：年 月 日)：");
    scanf("%d %d %d", &year, &month, &day);
    lunarCalendar(year, month, day);
    return 0;
}

该程序使用农历数据表 `lunarInfo` 来计算公历日期对应的农历日期。首先计算公历日期到基准日期（1900年1月31日）的天数，然后逐步推算农历日期。程序中还包含了判断闰年和计算每个月的天数等函数。