利用c语言实现万年历

以下是使用C语言实现万年历的代码示例：

#include <stdio.h>

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

// 计算某年某月的天数
int getDaysOfMonth(int year, int month) {
    int days;
    int run[] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int ping[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    
    if (isLeapYear(year)) {
        days = run[month - 1];
    } else {
        days = ping[month - 1];
    }
    
    return days;
}

// 计算某年某月某日是星期几
int getWeekday(int year, int month, int day) {
    int i, sum = 0;
    
    // 计算年份的天数
    for (i = 1900; i < year; i++) {
        if (isLeapYear(i)) {
            sum += 366;
        } else {
            sum += 365;
        }
    }
    
    // 加上月份的天数
    for (i = 1; i < month; i++) {
        sum += getDaysOfMonth(year, i);
    }
    
    // 加上当月的天数
    sum += day;
    
    // 计算星期几
    return sum % 7;
}

int main() {
    int year, month, day;
    
    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);
    
    int weekday = getWeekday(year, month, day);
    
    printf("%d年%d月%d日是星期%d\n", year, month, day, weekday);
    
    return 0;
}