[Solved] What is this boolean operation? `expression * boolean` [closed]

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The right way to do it is straight-forward:

int hours = /*some_number*/;
int wage = 100*hours;
if (hours > 40) wage += 50 * (hours-40);

To squeeze it to a single expression, the example takes advantage of the fact that a boolean is either 1 or 0. So x*some_bool evaluates to either x or 0.

In your case, if (hours > 40) then

(50*(hours-40))*(hours>40) == (50*(hours-40)) * 1 == 50*(hours-40)

otherwise it is 0.

(50*(hours-40))*(hours>40) == (50*(hours-40)) * 0 == 0

In general it is less readable to write code this way. The only valid uses IMO are in advanced algebraic transformations used in cryptography or complexity theory.

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solved What is this boolean operation? `expression * boolean` [closed]