c语言实现万年历系统

以下是C语言实现万年历系统的代码示例：

#include <stdio.h>

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

// 获取某某的天数
int getMonthDays(int year, int month) {
    int days;
    if (month == 2) {
        if (isLeapYear(year)) {
 days = 29;
        } else {
            days = 28;
        }
    } else if (month == 4 || month == 6 || month == 9 || month == 11) {
        days = 30;
    } else {
        days = 31;
    }
    return days;
}

// 获取某年某月的第一天是星期几
int getFirstDayOfWeek(int year, int month) {
    int dayOfWeek;
    int totalDays = 0;
    for (int i = 1900; i < year; i++) {
        totalDays += isLeapYear(i) ? 366 : 365;
    }
    for (int i = 1; i < month; i++) {
        totalDays += getMonthDays(year, i);
    }
    dayOfWeek = (totalDays + 1) % 7;
    return dayOfWeek;
}

// 打印日历
void printCalendar(int year, int month) {
    int firstDayOfWeek = getFirstDayOfWeek(year, month);
    int monthDays = getMonthDays(year, month);

    printf("     %d年%d月\n", year, month);
    printf("日 一 二 三 四 五 六\n");

    for (int i = 0; i < firstDayOfWeek; i++) {
        printf("   ");
    }

    for (int i = 1; i <= monthDays; i++) {
        printf("%2d ", i);
        if ((firstDayOfWeek + i) % 7 == 0) {
            printf("\n");
        }
    }

    printf("\n");
}

int main() {
    int year, month;

    printf("请输入年份：");
    scanf("%d", &year);
    printf("请输入月份：");
    scanf("%d", &month);

    printCalendar(year, month);

    return 0;
}