Sprintf error

Question

Hi
I'm using:
CC: Sun WorkShop 6 update 2 C++ 5.3 Patch 111685-19 2003/12/18
Following code:
#include <stdio.h>
#include <strings.h>
class Dummy
   public:
   bool sayCheese( char * Message )
      printf( "The message is [%s]\n", Message );
      return true;
int main()
   char buf1[200];
   char buf2[200];
   Dummy * dummy;
   strcpy( buf1, "Initial buf1 value" );
   strcpy( buf2, "Initial buf2 value" );
   sprintf( buf1, "Buf2 is [%s]", buf2 ),  /* Comma at the end of the line */
   dummy->sayCheese( buf1 );
}doesn't cause any error/warning messages from the compiler.
The output is
The message is [Buf2 is [Initial buf2 value]]
This is probably bug.
Regards
lazartchouk

Answer 1

I don't see an error in the source code. Well, actually I do. You call a member of class Dummy
through an uninitialized pointer "dummy". Since the
class has no virtual functions and "this" is not used
in "sayCheese", the program works by accident.
What this the error you had in mind? A compiler is
not required to diagose use of uninitialized
variables, although it would be nice if it did.Ok, probably this version is better:
#include <stdio.h>
#include <strings.h>
class Dummy
   public:
   bool sayCheese( char * Message )
      printf( "The message is [%s]\n", Message );
      return true;
int main()
   char buf1[200];
   char buf2[200];
   Dummy * dummy = new Dummy;
   strcpy( buf1, "Initial buf1 value" );
   strcpy( buf2, "Initial buf2 value" );
   sprintf( buf1, "Buf2 is [%s]", buf2 ), dummy->sayCheese( buf1 );
}Does anyone see something strange in the line with the "sprintf"?