If (int a) problem

[DaGoblin]

So here is part of a code i got:

DLLIMPORT void lv_ocl_Scalar_subtract(int sc, int ocl_src1, int dst, int mask, int *err)
{
try { 
	if (mask)
		subtract(*((Scalar*) sc) ,*((oclMat*) ocl_src1),*((oclMat*) dst),*((oclMat*) mask));

What trubbled me is whats with the if (mask). I mean, mask is an int so what does that if mean? The computer can read it as if (10), will he say yes or no

[MrHutch]

It'll evaluate the int as a bool.

So, if (mask) == if (mask != 0).

[DaGoblin]

Makes sense, thanks.

If something is undefined, would it automatically be considered 0 when used? I know thats how it goes in other langueges.

[AbstractionAnon]

No. If it's undefined, you will get a compiler error and will not get an executable file.