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c ÓïÑÔ free ³ö¶Ï´íÎó ¸ßÊÖÖ¸½Ì - C/C++ / CÓïÑÔ

ÕâÊÇÒ»µÀC±ÊÊÔÌâ ¸÷λ´ó´ó²»ÒªÎÊΪʲôҪ·µ»ØÖ¸Õë Õâ¸öÎÒÒ²²»ÖªµÀ .... ÌâÉϸøµÄº¯ÊýÔ­ÐÍÊÇÕâÑùµÄ¡«
ʹÓÃmalloc º¯ÊýÉêÇë¿Õ¼äºó free ÊÍ·Åʱ¶Ï´íÎóÁË ²»½â... ¸÷λ´ó´ó¸ø¿´¿´

/*
* ×Ö·û´®ÄæÐò ʹÓÃinerchar º¯Êý½«×Ö·û´®Ç°ºóµßµ¹ºó ·µ»ØÒ»¸öÖ¸Õë £¨ÌâÉÏÒªÇó£©
*/

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

char * inerchar(char *str)
{
  int len = 0, i = 0;
  char *strl = str; // ÓÃÓÚÄæÐò £­£­ ×Ö·û´®µÄÒ»°ë
  char *strr = str; // ÓÃÓÚÄæÐò £­£­ ×Ö·û´®µÄÁíÒ»°ë
  char temp;
  char *result = (char *)malloc(strlen(str) + 1);

  len = strlen(strl);
  for (i; i < (len / 2); i++) // ¿ªÊ¼½«×Ö·û´®Ç°ºóµßµ¹
  {
  temp = strl[len - i - 1];
  strl[len - i - 1] = strr[i];
  strr[i] = temp;
  }
  result = strr;

  return result;

}
int main(void)
{
  char str[] = {"Hello world"};
  char *p = inerchar(str);

  printf("inver string : %s \n", p);

  free(p); // ´Ë´¦¶Ï´íÎó ²»½â .... Ī·Ç free Ö»ÄÜÊÍ·ÅÒ»¸öº¯ÊýÌåÄÚÉêÇëµÄ¿Õ¼ä£¿
  p = NULL;

  return 0;
}

C/C++ code



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