#include 
    
     int year(int y){    if ((y % 4 == 0 && y % 100 != 0) || y % 400 == 0)        return 366;    else        return 365;}int main(int argc, const char * argv[]){    int y;        // 每月多少天    int days[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};        printf("请输入年份:\n");    scanf("%d", &y);        int sum = 0;    for (int i = 1; i < y; i++) {        sum += year(i);    }        int week = (sum + 1) % 7; // 1月1日星期几        if (year(y) == 366) {        days[1] = 29;    }        printf("\n%d年日历如下:\n", y);    for (int i = 0; i < 12; i++) {        printf("        %d月\n", i+1);        printf("  7  1  2  3  4  5  6\n");        printf("=====================\n");                for (int i = 0; i < week; i++) {            printf("   ");        }                int begin = 1;        while (begin <= days[i]) {            printf(" %02d", begin);            begin++;            week = (week + 1) % 7;            if (week == 0) {                printf("\n");            }        }        printf("\n\n");    }            return 0;}
    

运行结果:

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