Newsgroups: comp.os.msdos.programmer
Path: utzoo!utgpu!cunews!ajai
From: ajai@sce.carleton.ca (Ajai Sehgal)
Subject: TC++ Bug ?? or am I doing something wrong?
Message-ID: <ajai.658680108@rigel.sce.carleton.ca>
Summary: Help IF (m != mstore) doesn't work under c++
Sender: news@ccs.carleton.ca (news)
Organization: Carleton University, Ottawa, Canada
Date: 15 Nov 90 14:41:48 GMT

I have the following variable declared in a function:

	static int mstore;

The function prototype is as follows:

	void rfft(float *x, COMPLEX *y, int m)

note:COMPLEX is a structure with real and imag floats 


Here's the problem:

	After the first call to the function the statement mstore = m; is
executed. On the second call to the function I want to skip a section of
code if m still equals mstore, so I have the following:

	if (m != mstore){
		.....bunch of statements to initialize coefficients
	}

Unfortunatly the "bunch of statements" are always executed ( I stepped through).

Putting a watch on m,mstore and  m!=mstore I see the following:

	m : 7
	mstore: 7
	m != mstore: 0

but if I insert the statement n = (m != mstore); and put a watch on n I get:

	n : 1

What's going on here? If I compile using C instead of C++ everything works fine.Could this have something to do with using smart virtual tables under C++ ?

Any insight would be appreciated.

Regards, Ajai.


but if I insert the statement