#include <stdio.h> #include <stdlib.h> #include <windows.h> int is_leap_year(int year) { return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0); } int get_month_days(int year, int month) { int days = 0; switch (month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: days = 31; break; case 4: case 6: case 9: case 11: days = 30; break; case 2: days = is_leap_year(year) ? 29 : 28; break; default: break; } return days; } void print_calendar(int year, int month) { int days = get_month_days(year, month); int first_day = (year - 1) * 365 + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400; for (int i = 1; i < month; i++) { first_day += get_month_days(year, i); } int week_day = (first_day + 1) % 7; // 1月1日是星期一 printf("日 一 二 三 四 五 六\n"); for (int i = 0; i < week_day; i++) { printf(" "); } for (int i = 1; i <= days; i++) { printf("%2d ", i); week_day++; if (week_day == 7) { printf("\n"); week_day = 0; } } printf("\n"); } int main() { system("color E1"); int year, month; printf("请输入年份和月份（用空格隔开）："); scanf("%d %d", &year, &month); printf("%d年%d月的月历如下所示：\n", year, month); print_calendar(year, month); return 0; }能不能添加所有的注释

当然可以，下面是添加了注释的代码：

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

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

// 获取指定年份和月份的天数
int get_month_days(int year, int month) {
    int days = 0;
    switch (month) {
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:
            days = 31;
            break;
        case 4:
        case 6:
        case 9:
        case 11:
            days = 30;
            break;
        case 2:
            days = is_leap_year(year) ? 29 : 28;
            break;
        default:
            break;
    }
    return days;
}

// 打印指定年份和月份的日历
void print_calendar(int year, int month) {
    int days = get_month_days(year, month); // 获取当前月份的天数
    int first_day = (year - 1) * 365 + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400; // 计算当前年份1月1日的星期几
    for (int i = 1; i < month; i++) { // 累加计算当前月份1号是星期几
        first_day += get_month_days(year, i);
    }
    int week_day = (first_day + 1) % 7; // 1月1日是星期一，计算当前月份1号是星期几
    printf("日 一 二 三 四 五 六\n");
    for (int i = 0; i < week_day; i++) { // 打印当前月份1号之前的空白日期
        printf("   ");
    }
    for (int i = 1; i <= days; i++) { // 循环打印当前月份的日期
        printf("%2d ", i);
        week_day++;
        if (week_day == 7) { // 如果当前日期是星期六，换行
            printf("\n");
            week_day = 0;
        }
    }
    printf("\n");
}

int main() {
    system("color E1"); // 设置控制台颜色
    int year, month;
    printf("请输入年份和月份（用空格隔开）：");
    scanf("%d %d", &year, &month);
    printf("%d年%d月的月历如下所示：\n", year, month);
    print_calendar(year, month); // 打印指定年份和月份的日历
    return 0;
}