为什么呢？

Question

#include<stdio.h>#define MONTH 12int main(){ int days[MONTH]={31,28,31,30,31,30,31,31,30,31,30,31}; int month; do{   printf("input a month:");   scanf("%d",&month); }while (month<1||month>12); printf("The number of days is %d\n",days[MONTH-1]);    return 0;}

Answer 1

最后printf那里，应该是 days[month-1] 吧。  你写成days[MONTH-1]，岂不是每次都打印31.