devc++输出万年历

以下是使用Dev-C++输出万年历的代码示例：

#include <stdio.h>

int main()
{
    int year, month, day, i, j, days;
    int monthDays[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    char week[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};

    printf("Please enter the year: ");
    scanf("%d", &year);
    printf("Please enter the month: ");
    scanf("%d", &month);

    // 判断是否为闰年
    if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
        monthDays[1] = 29;
    }

    // 计算当月第一天是星期几
    day = 1;
    for (i = 1; i < month; i++) {
        day += monthDays[i - 1];
    }
    j = (year - 1) + (year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + day;
    j %= 7;

    // 输出日历表头
    printf("\n    %d-%02d\n", year, month);
    printf("--------------------\n");
    for (i = 0; i < 7; i++) {
        printf("%s ", week[i]);
    }
    printf("\n");

    // 输出日历内容
    days = monthDays[month - 1];
    for (i = 0; i < j; i++) {
        printf("    ");
    }
    for (i = 1; i <= days; i++) {
        printf("%3d ", i);
        if ((i + j) % 7 == 0) {
            printf("\n");
        }
    }
    printf("\n");

    return 0;
}