#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using namespace std;
int main()
{
char *src = “hello world”;
char dest = NULL;
int len = strlen(src);
dest = (char)malloc(len+1);
char *d = dest;
char *s = &src[len-1];
while(len-- != 0) // 循环赋值进行len次
*d++ = s–; // 赋值结束后执行d++，此时指针指向len位置处
*d = 0; //字符串常量末尾为0，及指针len位置处值为0
printf("%s\n", dest);
free(dest);
return 0;
}
