What is #if 1 1

[fox12]

Hi, Gurus,

I only have basic understanding of C language. In a program, I have the following code segment that I don't understand:

#if 1
close_transaction();
#else
exec_transaction();
#endif

My question is what the line "#if 1" mean, and from where I should look to find the control whether it is "1" or "0".

Do appreciate your help on this.

Fox12

 

[cpjust]

#if 1 is badly written code which someone is (or was) debugging.

0 = false
Everything else = true

So the #if 1 block will always be executed and the #else will never be executed.

 

[fox12]

Thank you so much. It's very helpful.