Re: [Dev-C++] Stress with structs and pointers.

[<or...@vp...>]

David McKen wrote:
> Ok, I need some clarification on a couple topics invloving pointers and 
> pointers.
>  
> 1) when a struct is created. All that can be assumed is that it contains 
> trash right? What is a portable way to initalize everything to 0? mset?

That is the simplest, if you have a LARGE structure.

#include <mem.h> /* or string.h, I'm not sure */

struct mystruct {
   int a,b,c;
   char d,e,f;
   long g,h,i,j,k,l,m,n;
   /* ... */
};

int main()
{
   struct mystruct ms;
   memset(&ms,0,sizeof(struct mystruct));
   return 0;
}


The above code is pure C. In C++, you don't need the "struct" word, when 
using mystruct. So, in C++, the first 2 line in main():

mystruct ms;
memset(&ms,0,sizeof(mystruct));

memset() is also portable, and it will always work, even if you alter 
the definition of your structure (add new elements). This way, you don't 
have to use a LONG list to set everything to 0.

--
Greetings,
   Balázs