>>281
#include<stdio.h>
#include<stdlib.h>
void *myfree(void **p)
{
free(*p);
*p = NULL;
return NULL;
}
int main()
{
char *p = (char *) malloc(123);
printf("%p\n", p);
p = myfree((void **) &p);
printf("%p\n", p);
return 0;
}