I want to round an unsigned integer to the immediately inferior even integer, can I divide by 2 then multiply by 2? – stackoverflow.com

I want to round an unsigned integer to the immediately inferior even integer, can I divide by 2 then multiply by 2? – stackoverflow.com

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For example : f(8)=8 f(9)=8 Can I do x = x/2*2; ? Is there a risk that the compiler will optimize away such expression ?

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