Re: c++/9740: Object included in another is not initialized properly

Re: c++/9740: Object included in another is not initialized properly

[bangerth]

Synopsis: Object included in another is not initialized properly

State-Changed-From-To: open->closed
State-Changed-By: bangerth
State-Changed-When: Wed Feb 19 02:42:58 2003
State-Changed-Why:
    Reading a good book about C++ might help.
    
    What you do here
    class A {
      int i;
      int p;
    public:
    ==>  A() {A(0); };
      A(int j) {i=j; p=0; cout << "in A constuctor:\np=" << p << endl;};
      int getp() { return p; };
    };
    
    is not redirecting from one constructor to another, but
    you create an unnamed, temporary object and call its
    conversion constructor. The object you're presently in
    in the first constructor is not change, and is left
    uninitialized.
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9740

c++/9740: Object included in another is not initialized properly

[tron]

>Number:         9740
>Category:       c++
>Synopsis:       Object included in another is not initialized properly
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 18 11:06:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Eviatar Tron
>Release:        3.2.2
>Organization:
>Environment:
Configured with: ./configure
Thread model: posix
>Description:
I have an object a of class A which has a memeber from another class B.

the A constructor includes a statment to zero it's memebrs
when the B constructor is called, it trashes the a object,
so that those members are not zero, but some random value.


>How-To-Repeat:
compile the file using g++ -g 
when run, it prints the value of a.p at the
construction, and after the construction
>Fix:
I tried working with pointers as well, but didnt succeed

>Release-Note:
>Audit-Trail:
>Unformatted:
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