Re: [TCLUG:10678] Simple C Question

[Thomas Veldhouse <veldy@visi.com>]

Hello.

I assume that FO_offset is an integer;

#define UPPER_LIMIT 256
int FO_offset = 0;

while (FO_offset += 16 <= UPPER_LIMIT)
	printf("%d\n", FO_offset);

Tom Veldhouse
veldy@visi.com


On Wed, 1 Dec 1999, Brian Ackermann wrote:

> Ok, simple question for all you C programmers out there...
> 
> Here's the line of code in question...
> 
> printf("%s\n", (char *)(FO_Offset+=16));
> 
> Assuming FO_Offset=0 at start and this code runs in a loop we should
> see:
> 
> 16
> 32
> 48
> 64
> 80
> 96
> 
> and so on...
> 
> I'm assuming that (FO_Offset+=16) evaluates to an integer value, say,
> 16, in
> the first instance,
> and then casting it to a (char *) will let the printf() do what it
> does.
> 
> The program compiles without errors or warnings, but the text is just
> garbage...
> 
> What am I missing?
> 
> Thanks in advance,
> Brian J. Ackermann
> 
> 
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