Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!mips!sjsca4!poffen
From: poffen@sj.ate.slb.com (Russ Poffenberger)
Newsgroups: comp.lang.c++
Subject: How to correctly initialize struct/class
Message-ID: <1990Aug20.220157.24736@sj.ate.slb.com>
Date: 20 Aug 90 22:01:57 GMT
Reply-To: poffen@sj.ate.slb.com (Russ Poffenberger)
Organization: Schlumberger Technologies, San Jose, CA.
Lines: 44


Hi,

Is there a way (simple) to do the following.

I want to define a union, such that it can be either a float value, or a
pointer.

union both {
  float value;
  float *value;
};

Now I want to define a structure (or class) like so that uses several instances
of this union.

struct data {
  union both one;
  union both two;
  union both three;
  union both four;
  union both five;
};

Now what I need to do is to declare an instance of the struct, but initialize
all of the fields. Any of the fields may be initialized to either a floating
point constant, or the address of a floating variable.

e.g.

float f1;
float f2;

struct data d1 = (&f1,4.3,&f2,7.2,0.0)
struct data d2 = (0.0,1.0,2.0,3.0,4.0)

etc...

How can I declare a constructor to do this? Is it even possible?

Russ Poffenberger               DOMAIN: poffen@sj.ate.slb.com
Schlumberger Technologies       UUCP:   {uunet,decwrl,amdahl}!sjsca4!poffen
1601 Technology Drive		CIS:	72401,276
San Jose, Ca. 95110             (408)437-5254