Multiple assignment on one line not working as expected

Question

I\'m trying to swap two ints - x and y in the example, and do it in one line without a library function.

So I started with thi

Answer 1

Lets divide and compute.

The innermost parenthesis executes first and after all the parenthesis resolved, then the expression executes from left to right.

x ^= (y ^= (x ^= y));   // initial statement

x = x^(y = y^ (x = x^y)); //equals to 

() have the highest precedence

x = x^(y = y^ (x = 3^4)); // first highest precedence () 

x = x^(y = y ^ (x = 7)); // still the first x is 3

x = 4 ^(y = 3 ^ (x = 7));  // now 3 ^ 7 =4

x = 4 ^ 4;  // now  3 ^ 7 =4

x= 0;