C Syntax Question

[RobMunfy]

Could anybody possibly explain what this is doing:

val ? 255. / val : 0.

Thanks

edit - it's passed as an argument to a function where val is a float

 

[zpos]

Take a peek at this http://en.wikipedia.org/wiki/Conditional_operator

It is essentially shorthand for an if else statement.

if (val) {
255. / val
}
else {
0.
}

As it's being passed in as an argument to a function, a number is derived and passed. The decimal point after the numbers is forcing a type.

 

[RobMunfy]

ah right, so essentially it's saying:

if(val) send 255/val to function
else send 0 to function

?

 

[RobMunfy]

wow, sorry just realised i posted this in the wrong section!

Sorted it now anyway. Thanks

 

[Spyhop]

So it avoids a divide by zero!