我的入門練習五

#include<stdio.h> 5
void main()
{
    int month,year;
    printf(“請輸入一個年份和月份:”);
    scanf("%d%d",&year,&month);
    switch(month){
    case 1:printf(“該月有31天\n”);break;
    case 3:printf(“該月有31天\n”);break;
    case 4:printf(“該月有30天\n”);break;
    case 5:printf(“該月有31天\n”);break;
    case 6:printf(“該月有30天\n”);break;
    case 7:printf(“該月有31天\n”);break;
    case 8:printf(“該月有31天\n”);break;
    case 9:printf(“該月有30天\n”);break;
    case 10:printf(“該月有30天\n”);break;
    case 11:printf(“該月有30天\n”);break;
    case 12:printf(“該月有31天\n”);break;
    case 2:
        if((year%40&&year%100!=0)||year%4000)
        {
          printf(“該月有29天\n”);
        }
        else
        {
            printf(“該月有28天\n”);
        }break;
        default:printf(“輸入有誤\n”);break;