C++实现回文

来源：互联网发布：c语言中长整型变量编辑：程序博客网时间：2024/05/20 05:05

*.h文件

#ifndef _HWCHANGE_H
#define _HWCHANGE_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_SIZE 256

class CHuChange
{
     public:
         CHuChange();
         virtual ~CHuChange();
         bool change(char *str);

         char* get_info();

         void relese();
     public:
        char* Buf;
};

#endif

*.cpp文件

#include "hu_change.h"

CHuChange::CHuChange()
{
     Buf = NULL;
}

CHuChange::~CHuChange()
{
     if (Buf != NULL)
      {
//      free(Buf);
//      Buf = NULL;
      }
}

void CHuChange::relese()
{
     if (Buf != NULL)
     {
       free(Buf);
        Buf = NULL;
    }
}

bool CHuChange::change(char* str)
{
     if (NULL == str)
     {
         perror("str is null");
         return false;
     }

     int     len = strlen(str);
     Buf = (char*)malloc(sizeof(char) * (len + 1));

     char*   buf1 = Buf;
     while(*str != '/0')
     {
         *buf1++ = *str++;
     }

    *str--;

     for(int i = 0; i<len; i++)
     {
         *buf1++ = *str--;
     }

     *buf1 = '/0';

return true;
}

char* CHuChange::get_info()
{
return Buf;
}

测试代码

#include <stdio.h>
#include "hu_change.h"

int main()
{
     printf("please input a string:/n");

     char str[MAX_SIZE] = {0};
     scanf("%s",&str);

     CHuChange c_hu_change;
     c_hu_change.change(str);
     char* buf = c_hu_change.get_info();

     printf("the hu_change string is %s/n",buf);

     c_hu_change.relese();

     return 0;
}

有问题的话欢迎指教 O(∩_∩)O~