no Divide by Zero?

[bberrevoets]

Hi all,

My question is why does the following code just work.

Code: Select all

int a=0,b=1,c;
c=b/a;

i have used demo8.zip.

Code: Select all

geninterrupt(0);

give me a divide by zero error, but the above code just works?

Why?

Bert Berrevoets.

[Mike]

MSVC++ likes to take out code that is never referenced or used anywhere for performance reasons. If you just dumped that code in MSVC++, it will most likely take it out as it is never used.

Best way to test divide by zero is with inline assembly with MSVC++, or to actually use the variables (Like throwing it into a printf() so the compiler does not do that).

For example, this should generate divide by 0. Notice the call to printf()..

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int a=0,b=1,c;
c=b/a;
DebugPrintf ("%i", c);

Hope this helps -- and welcome to the forums

[bberrevoets]

Thanks Yep that was working.

I'm normally working with linux, and i must say the microsoft way is a lot harder, but i like your tutorials and the way MSVS 2005 gives you intiligence and that kind of things.

Can't wait for the next tutorials thanks a lot.
Bert Berrevoets