输入月份，输出有多少天

#include <stdio.h>

int main()
{
    int days[]={31,28,31,30,31,30,31,31,30,31,30,31};
    int month;
    scanf("%d",&month);
    if(month<1||month>12)
        printf("错误！\n");
    else
    printf("%d\n",days[month-1]);
    return 0;
}