c语言编程：1.当输入年时，能显示那一年的台历 2.当输入年月时，能输出这个月的台历 3.输入年月日，能输出这天是这年的第几周和第几天，是否是农历中国传统的节日，如果是，是什么节日。

以下是C语言代码实现：

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

// 判断是否是闰年
int isLeapYear(int year) {
    if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
        return 1;
    }
    return 0;
}

// 获取某年某月的天数
int getDaysOfMonth(int year, int month) {
    int days;
    switch (month) {
        case 2:
            days = isLeapYear(year) ? 29 : 28;
            break;
        case 4:
        case 6:
        case 9:
        case 11:
            days = 30;
            break;
        default:
            days = 31;
            break;
    }
    return days;
}

// 获取某年某月1号是星期几（0表示星期日，1表示星期一，以此类推）
int getWeekday(int year, int month) {
    int days = 0;
    for (int i = 1900; i < year; i++) {
        days += isLeapYear(i) ? 366 : 365;
    }
    for (int i = 1; i < month; i++) {
        days += getDaysOfMonth(year, i);
    }
    return (days + 1) % 7;
}

// 输出某年的台历
void printCalendar(int year) {
    printf("=========================%d年=========================\n", year);
    printf("   一   二   三   四   五   六   日\n");
    int weekday = getWeekday(year, 1);
    for (int i = 0; i < weekday; i++) {
        printf("     ");
    }
    for (int i = 1; i <= 12; i++) {
        int days = getDaysOfMonth(year, i);
        for (int j = 1; j <= days; j++) {
            printf("%4d ", j);
            weekday++;
            if (weekday == 7) {
                printf("\n");
                weekday = 0;
            }
        }
        if (weekday != 0) {
            printf("\n");
        }
    }
}

// 输出某年某月的台历
void printCalendarOfMonth(int year, int month) {
    printf("===================%d年%d月===================\n", year, month);
    printf("   一   二   三   四   五   六   日\n");
    int weekday = getWeekday(year, month);
    for (int i = 0; i < weekday; i++) {
        printf("     ");
    }
    int days = getDaysOfMonth(year, month);
    for (int i = 1; i <= days; i++) {
        printf("%4d ", i);
        weekday++;
        if (weekday == 7) {
            printf("\n");
            weekday = 0;
        }
    }
    if (weekday != 0) {
        printf("\n");
    }
}

// 判断是否是农历传统节日
int isTraditionFestival(int month, int day) {
    char *festival[24] = {"元旦", "春节", "元宵", "清明", "劳动", "端午",
                          "中元", "中秋", "重阳", "寒衣", "小雪", "大雪",
                          "腊八", "小年", "除夕", "腊月二十三", "腊月二十四",
                          "腊月二十五", "腊月二十六", "腊月二十七", "腊月二十八",
                          "腊月二十九", "腊月三十", "春分", "秋分"};
    int festivalMonth[24] = {1, 1, 1, 4, 5, 5, 7, 8, 9, 10, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 3, 9};
    int festivalDay[24] = {1, 1, 15, 4, 1, 5, 15, 15, 9, 1, 7, 22, 8, 23, 30, 23, 24, 25, 26, 27, 28, 29, 20, 23};
    for (int i = 0; i < 24; i++) {
        if (month == festivalMonth[i] && day == festivalDay[i]) {
            printf("是%s\n", festival[i]);
            return 1;
        }
    }
    return 0;
}

// 输出某年某月某日的信息
void printInfo(int year, int month, int day) {
    // 判断这天是第几周
    int days = 0;
    for (int i = 1; i < month; i++) {
        days += getDaysOfMonth(year, i);
    }
    days += day;
    int week = days % 7 == 0 ? days / 7 : days / 7 + 1;
    printf("这天是第%d周，", week);

    // 判断是否是农历节日
    if (!isTraditionFestival(month, day)) {
        printf("不是传统节日\n");
    }
}

int main() {
    int year, month, day;
    printf("请输入年份：");
    scanf("%d", &year);
    printf("请输入月份（或输入0返回年台历）：");
    scanf("%d", &month);
    if (month == 0) {
        printCalendar(year);
    } else {
        printf("请输入日期（或输入0返回月台历）：");
        scanf("%d", &day);
        if (day == 0) {
            printCalendarOfMonth(year, month);
        } else {
            printInfo(year, month, day);
        }
    }
    system("pause");
    return 0;
}

运行程序后，根据提示输入年月日信息即可输出对应的结果。