c++ - Is it safe to have an invalid operation in the second half of && in an if statement? -


is safe:

if(sprite->numberofsides !=0 && sprite->value%sprite->numberofsides!=0)

if sprite->numberofsides can == 0?

the reason ask, if frame if statement this:

if(sprite->value%sprite->numberofsides!=0 && sprite->numberofsides !=0)

i exception (because can't n%0). reversing former statement works fine, don't want trouble down road when compiling different devices.

yes it's safe. short-circuiting guaranteed standard.

this means if first part of , (&&) expression evaluates false, it's guaranteed second part won't evaluated.

from c++03 - 5.14/1

the && operator groups left-to-right. [...] second operand not evaluated if first operand false.


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