谢谢ldsh304  marlow  炎天  九转星河  client苏
你们给的代码我都好好看了

int main()
{
    char str2[30][31];
    char temp;
    int len;
    int i=0;
    int j=0;
    while(gets(str2[i])!=NULL)           //取一行的字符串
    {
        len=strlen(str2[i]);
        for(j=0; j<len/2; j++)                      //将首尾互换
        {                                           //
             temp = str2[i][j];                     //
             str2[i][j] = str2[i][len-1-j];         //
             str2[i][len-1-j] = temp;               //
        }
        i++;                                        //下一行
    }
    for(j=i-1;j>=0;j--)                             //以ctrl+c结束
    {
        printf("%s\n",str2[j]);                     //输出逆反后的数组
    }
    return 0;
}

-----------------------------------------------分割线-------------------------1

char ch[31];
while ((gets(ch)) != null)         //取一行的字符串
{
    int len = strlen(ch);          //strlen(ch)取字符串长度（到'\0'结束
    for (int i = 0; i <= len/2; i++)//将数组逆反
    {
        char temp = ch[i];
        ch[i] = ch[len-i-1];
        ch[count-i-1] = temp;
    }
}

-----------------------------------------------分割线-------------------------2

#include <stdio.h>
#include <string.h>
#define MAXLINE 30

int main(void)
{
    char ch[MAXLINE];
    int n;

    while(gets(ch) != NULL)   //读取字符串
    {
        n = strlen(ch);   
        for(; n > 0; n--)
            printf("%c", ch[n - 1]);    //逆反输出
    }

    return 0;
这是我的理解
但是
#include<stdio.h>
void fun()
{
    char ch;

    if (scanf("%c",&ch)!=EOF)
        fun();

    if (ch!='\0')
        printf("%c",ch);
}
int main()
{
    fun();

    printf("\n");

    return 0;
}这个代码的将数组反输出在哪？
（指针还没学，我以后在回过来看）