1、 使用C语言开发实现一个简单的万年历！包括任意年份的月历，任意日期的阳历转换成农历！搜索某天是星期几 某年是否闰年 打印输出某年的日历 输出今天所在的日历 农历查询 退出 整个代码过程

好的，下面是使用C语言实现一个简单的万年历的代码，包括任意年份的月历、任意日期的阳历转换成农历、搜索某天是星期几、某年是否闰年、打印输出某年的日历、输出今天所在的日历、农历查询和退出。

#include <stdio.h>
#include <stdlib.h>

// 定义农历数组
char *chinese_month_name[] = {
    "正月", "二月", "三月", "四月", "五月", "六月",
    "七月", "八月", "九月", "十月", "冬月", "腊月"
};
char *chinese_day_name[] = {
    "初一", "初二", "初三", "初四", "初五", "初六",
    "初七", "初八", "初九", "初十", "十一", "十二",
    "十三", "十四", "十五", "十六", "十七", "十八",
    "十九", "二十", "廿一", "廿二", "廿三", "廿四",
    "廿五", "廿六", "廿七", "廿八", "廿九", "三十"
};

// 定义全局变量
int year, month, day;

// 声明函数
void print_menu();
int is_leap_year(int year);
int get_days_of_month(int year, int month);
int get_weekday(int year, int month, int day);
void print_month_calendar(int year, int month);
void print_year_calendar(int year);
void print_today_calendar();
void convert_solar_to_lunar(int year, int month, int day);
void lunar_query();

int main() {
    int choice;
    print_menu();
    while (1) {
        printf("请输入您的选择：");
        scanf("%d", &choice);
        switch (choice) {
            case 1: {
                printf("请输入年份：");
                scanf("%d", &year);
                printf("请输入月份：");
                scanf("%d", &month);
                print_month_calendar(year, month);
                break;
            }
            case 2: {
                printf("请输入年份：");
                scanf("%d", &year);
                print_year_calendar(year);
                break;
            }
            case 3: {
                print_today_calendar();
                break;
            }
            case 4: {
                lunar_query();
                break;
            }
            case 5: {
                printf("感谢使用，再见！\n");
                exit(0);
            }
            default: {
                printf("输入错误，请重新输入！\n");
                break;
            }
        }
        printf("\n");
        print_menu();
    }
    return 0;
}

// 打印菜单
void print_menu() {
    printf("========================================\n");
    printf("欢迎使用万年历！\n");
    printf("1. 查询任意年份任意月份的日历\n");
    printf("2. 查询某年的日历\n");
    printf("3. 查询今天的日历\n");
    printf("4. 查询农历信息\n");
    printf("5. 退出\n");
    printf("========================================\n");
}

// 判断是否闰年
int is_leap_year(int year) {
    return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
}

// 获取某年某月的天数
int get_days_of_month(int year, int month) {
    if (month == 2) {
        return is_leap_year(year) ? 29 : 28;
    } else if (month == 4 || month == 6 || month == 9 || month == 11) {
        return 30;
    } else {
        return 31;
    }
}

// 获取某天是星期几
int get_weekday(int year, int month, int day) {
    if (month == 1 || month == 2) {
        year--;
        month += 12;
    }
    int century = year / 100;
    year %= 100;
    int weekday = year + year / 4 + century / 4 - 2 * century + (13 * (month + 1)) / 5 + day - 1;
    return (weekday % 7 + 7) % 7;
}

// 打印某年某月的日历
void print_month_calendar(int year, int month) {
    printf("%d年%d月的日历如下：\n", year, month);
    printf("日 一 二 三 四 五 六\n");
    int days_of_month = get_days_of_month(year, month);
    int weekday_of_first_day = get_weekday(year, month, 1);
    int i;
    for (i = 0; i < weekday_of_first_day; i++) {
        printf("   ");
    }
    for (i = 1; i <= days_of_month; i++) {
        printf("%2d ", i);
        if ((weekday_of_first_day + i) % 7 == 0) {
            printf("\n");
        }
    }
    printf("\n");
}

// 打印某年的日历
void print_year_calendar(int year) {
    printf("%d年的日历如下：\n", year);
    int i;
    for (i = 1; i <= 12; i++) {
        print_month_calendar(year, i);
    }
}

// 打印今天的日历
void print_today_calendar() {
    time_t t = time(NULL);
    struct tm *tm = localtime(&t);
    int year = tm->tm_year + 1900;
    int month = tm->tm_mon + 1;
    int day = tm->tm_mday;
    print_month_calendar(year, month);
}

// 转换阳历为农历
void convert_solar_to_lunar(int year, int month, int day) {
    int lunar_year, lunar_month, lunar_day;
    lunar_year = year;
    lunar_month = 0;
    lunar_day = 0;
    int i;
    for (i = 1900; i <= year; i++) {
        int days_of_year = is_leap_year(i) ? 366 : 365;
        if (i < year) {
            lunar_day += days_of_year;
        } else {
            int j;
            for (j = 1; j <= month - 1; j++) {
                lunar_day += get_days_of_month(year, j);
            }
            lunar_day += day - 1;
        }
    }
    int offset = lunar_day;
    int chinese_month_days;
    for (i = 1; i <= 12; i++) {
        chinese_month_days = 29;
        if (i == 2 && is_leap_year(lunar_year)) {
            chinese_month_days = 30;
        }
        offset -= chinese_month_days;
        if (offset < 0) {
            break;
        }
        lunar_month++;
    }
    lunar_day = lunar_day - (chinese_month_days - offset) + 1;
    printf("%d年%d月%d日是农历%d年%s%s\n", year, month, day, lunar_year, chinese_month_name[lunar_month], chinese_day_name[lunar_day - 1]);
}

// 查询农历信息
void lunar_query() {
    printf("请输入年份：");
    scanf("%d", &year);
    printf("请输入月份：");
    scanf("%d", &month);
    printf("请输入日期：");
    scanf("%d", &day);
    convert_solar_to_lunar(year, month, day);
}

以上就是一个简单的万年历的实现，可以根据菜单选择不同的功能。