Domanda di colloquio di Visa Inc.

How to swap two variables without a temp

Risposte di colloquio

Anonimo

11 mag 2015

a=a^b b=a^b a=a^b

2

Anonimo

5 mag 2015

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

2

Anonimo

9 mar 2016

What if the variable is big. like the max value of an integer. How do we do this without changing it to long (which is easy but obviously not the solution) use bitwise operations. a=3 b=4 a = a xor b xor a b = a xor b xor b