char ch[31];
while ((gets(ch)) != null)
{
    int len = strlen(ch);
    for (int i = 0; i <= len/2; i++)
    {
        char temp = ch[i];
        ch[i] = ch[len-i-1];
        ch[count-i-1] = temp;
    }
}

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

int main(void)
{
    char ch[MAXLINE];
    int n;
   
    while(gets(ch) != NULL){
        n = strlen(ch);
        for(; n > 0; n--)
            printf("%c", ch[n - 1]);
    }
    return 0;

#include<stdio.h>
#include<string.h>
int fun(char *a)
{
   char ch;
   char *shou = a;
   int l = strlen(a);
   char *wei = a + l -1;
   
   while(shou < wei)
   {
         ch = *shou;
         *shou++ = *wei;
         *wei-- = ch;
         
       }
      puts(a);   
}

main()
{
    char *p[100] ;
    char s[100][100];
    int i = 0;
   
    while(gets(s[i]) != NULL)
    {
       p[i] = s[i];
       i++;
     }
   
    for(int j = i-1; j >=0 ; j--)
    {
         fun(p[j]);
    }
     
     return 0;
}

#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;
}

[此贴子已经被作者于2016-12-1 20:06编辑过]

int main()
{
    char str2[30][31];
    char temp;
    int len;
    int i=0;
    int j=0;
    while(gets(str2[i])!=NULL)
    {        
        len=strlen(str2[i]);
        for(j=0; j<len/2; j++)
        {
             temp = str2[i][j];
             str2[i][j] = str2[i][len-1-j];
             str2[i][len-1-j] = temp;
        }
        i++;
    }
    for(j=i-1;j>=0;j--)
    {
        printf("%s\n",str2[j]);
    }
    return 0;
}

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）