Question

Can someone explain the following piece of code

int x = 45; 
int y = x &= 34;

It assigns 32 to y

Answer 1

It’s performing a bitwise “and” as a compound assignment operator. It’s equivalent to:

int x = 45;
x = x & 34;
int y = x;

Now 45 = 32 + 8 + 4 + 1, and 34 = 32 + 2, so the result of a bitwise “and” is 32.

Personally I think that using a compound assignment operator in a variable declaration is pretty unreadable – but presumably this wasn’t “real” code to start with…