Pergunta de entrevista da empresa IBM

swap two numbers without using temporary variable

Respostas da entrevista

Sigiloso

15 de mai. de 2011

b=a+b; a=b-a; b=b-a;

Sigiloso

30 de mai. de 2011

Sagar's answer is decent, but there might be problems if they consider overflow. Better is using xor: b = a XOR b a = a XOR b b = a XOR b