different return value from same variable
- From: marty moore <remoorsed yahoo com>
- To: "gtkmm-list gnome org" <gtkmm-list gnome org>
- Subject: different return value from same variable
- Date: Sat, 21 Jan 2012 17:24:37 -0800 (PST)
Hi all,
I have a wierd C++/gtkmm problem. I have two functions which return the value of the same variable - and produce different values for that variable. I'm guessing it's not a gtkmm problem, but I'm not sure. Please bear with me.
the details:
in ctx.h: the header file for class Cnb, a sub-window for class Gui, which is a Gtk::Window.
Cnb contains both functions ( get_opmode & get_opmode2 ) and the variable ( _opmode ). e_opmode is the enum data type for _opmode.
class Cnb : public Gtk::Window
{
...
e_opmode get_opmode () { return _opmode; }
e_opmode get_opmode2 ();
...
e_opmode _opmode; // current operation mode
...
};
in ctx.cpp: the
implementation file for ctx.h:
...
e_opmode Cnb::get_opmode2 ()
{
return _opmode;
}
...
in gui.cpp: a Gtk::Window (main window) class where CNB is declared,
After declaring CNB, I call the 2 functions which return the same variable ( _opmode ).
Gui::Gui( bool is_sync)
{
...
CNB = new Cnb();
std::cout << "gui 1: &CNB = " << &CNB << ", &_opmode = "
<< &CNB->_opmode << std::endl;
std::cout << "gui 1: CNB->get_opmode2 = "
<< CNB->get_opmode2() << ", CNB->get_opmode = "
<< CNB->get_opmode() << std::endl;
std::cout << "gui 1: &CNB = "
<< &CNB << ", &_opmode = "
<< &CNB->_opmode << std::endl;
...
}
the following output results:
...
gui 1: &CNB = 0x6d0a70, &_opmode = 0x94a460
gui 1: CNB->get_opmode2 = 1, get_opmode = 19464624
gui 1: &CNB = 0x6d0a70, &_opmode = 0x94a460
...
The correct value is '1'.
I get no errors on compilation or run-time. The addresses of CNB and _opmode isn't always the same for successive program tun, so it's not a RAM problem.
I've rebooted and re-strated emacs, with the same error.
Does anyone have a clue as to why I have different values for _opmode when using the 2 functions?
I'm completelly stumped.
I'm using:
Fedora 14
gcc-4.5.1-4
Emacs 23.2-7
gtkmm24-2.22.0-1
Thanks in advance for shedding some
light on this.
Marty
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