All challenges
Code AnalysisIntermediate 60s

atomic double CAS loop output

std::atomic<double> a{1.0}; double expected=1.0; while(!a.compare_exchange_weak(expected, expected*2.0, relaxed)){} // starting a==1.0, single thread What is a after the loop?

Think you can answer under pressure?

Get matched and answer live questions in 3-minute 1v1 battles. Elo ranking, badge tiers and bragging rights on the line.

Play this in a 3-minute battle