From:	Martin Ambuhl <mambuhl AT earthlink DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: C++ problem
Date:	Thu, 01 Oct 1998 04:32:18 -0400
Organization:	Nocturnal Aviation
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Endlisnis wrote:
> 
> Martin Ambuhl wrote:
> 
> >      void SetMode(int mode) {
> >         if (mode == 0)
> >             PrintPtr = &PrintMode0;
> >         if (mode == 1)
> >             PrintPtr = &PrintMode1;
> >      }
> 
>     This is wrong.  It would take the address of the variable containing the
> address of the function.--

Ok.  I invite "Endlisnis" to point me to the "variable containing the
address of the function".  Get a clue before posting "corrections."

The code from which this was extracted, in which PrintMode[01] are
member functions and not variables:

#include <stdio.h>

class Test
{
    int testint;
    void (Test::*PrintPtr) ();
     public:
     Test(int in_testint) {
        testint = in_testint;
     } 
     void SetMode(int mode) {
        if (mode == 0)
            PrintPtr = &PrintMode0;
        if (mode == 1)
            PrintPtr = &PrintMode1;
     } 
     void PrintMode0() {
        printf("mode 0: %d\n", testint);
     } 
     void PrintMode1() {
        printf("mode 1: %d\n", testint);
     } 
     void Print() {
        (this->*PrintPtr)();
     }
};

int main()
{
    Test test1(10);
    test1.SetMode(0);
    test1.Print();              // This should print 10
    return 0;
}



>      (\/) Endlisnis (\/)
>           s257m AT unb DOT ca
>           Endlisnis AT GeoCities DOT com
>           Endlisnis AT BrunNet DOT Net

-- 
Martin Ambuhl (mambuhl AT earthlink DOT net)
Note: mambuhl AT tiac DOT net will soon be inactive

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