#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc, const char *argv[])
{
char *src="hello world";
char *dest=NULL;
int len = strlen(src);
dest=(char *)malloc(len+1);
if(NULL==dest)
{
printf("malloc is fail");
return -1;
}
char *d=dest;
char *s=&src[len-1];
while(len--!=0)
*d++=*s--;
*d='\0';
puts(dest);
free(dest);
dest=NULL;
return 0;
}
