#include"stdio.h"
void main()
{   
    int i;
        char s[][14]={
                        "illegal month",
                        "one",
                        "two",
                        "three",
                        "four",
                        "five",
                        "six",
                        "seven",
                        "eight",
                        "nine",
                        "ten",
                        "eleven",
                        "twelve"

                    };
    printf("input a number:\n");
    scanf("%d\n",&i);
    printf("%s\n",(i<1||i>12)?s[0]:s[i]);
}

怎么每次都要输入两次啊 才能显示第一次输入的结果

scanf("%d\n",&i);  改成  scanf("%d",&i);

#include"stdio.h"
void main()
{   
    int i;
        char s[][14]={               //请问这里改为13有区别吗？
                        "illegal month",
                        "one",
                        "two",
                        "three",
                        "four",
                        "five",
                        "six",
                        "seven",
                        "eight",
                        "nine",
                        "ten",
                        "eleven",
                        "twelve"

                    };
    printf("input a number:\n");
    scanf("%d\n",&i);
    printf("%s\n",(i<1||i>12)?s[0]:s[i]);
}

改成13好象没啥区别吧。

没区别 只要保证最长的字符串都有储存空间就行

char s[][14]={               //请问这里改为13有区别吗？
                        "illegal month",

改成13 就是字符数组，
改成14 就是字符串

#include"stdio.h"
void main()
{   
    int i;
        char s[][14]={
                        "illegal month",
                        "one",
                        "two",
                        "three",
                        "four",
                        "five",
                        "six",
                        "seven",
                        "eight",
                        "nine",
                        "ten",
                        "eleven",
                        "twelve"

                    };
    printf("input a number:\n");
    scanf("%d",&i);
    printf("%s\n",(i<1||i>12)?s[0]:s[i]);
}就这样OK了！