From: kkuzba{at}centurytel.net
To: c_echo{at}yahoogroups.com

* Author: Bo Simonsen
BS>  I've a function here.
BS>  char * test()
BS>  {
BS>     char * tmp = NULL;
BS>     tmp = (char *) malloc(80);
BS>     sprintf(tmp, "test");
BS>     return tmp;
BS>  }
BS>  int main()
BS>  {
BS>     printf("%s", test());
BS>  }
BS>  How do i free the memory i allocated for tmp?

    You have to have the pointer, of course!  To avoid accidentally
 attempts to free a null pointer on failure of the malloc(), you
 might wish to test the value of the pointer before calling free()
 or using the pointer to accept data intended for later use.
 Writing to a null pointer on an unprotected OS, such as DOS, is a
 very quick method for arriving at unexpected catastrophic failure.
 (I included fgets() lest the window shut too quick to be seen.)

#include 
#include 
char* test()
{
   char* tmp = (char*)malloc(80);
   if(tmp) sprintf(tmp, "test");
   return tmp;
}
int main()
{
   char* cTmp, buf[16];
   printf("%s", cTmp = test());
   if(cTmp) free(cTmp);
   fgets(buf, 16, stdin);
   return 0;
}

>  kkuzba{at}centurytel.net   http://home.centurytel.net/kkuzba
>  'My very bones are chilled,' said Gimli, flapping his arms and
>  stamping his feet. Day had come at last.

--- SoupGate-Win32 v1.05