Question

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What is the fastest way to swap values in C?

I need to exchange values of two integers (for example x and y)
This is the simplest way:

int temp = x;
x = y;
y = temp;

and I also found a better way:

x = x + y;
y = x - y;
x = x - y;

Is there a better way to increase performance?

Answer 1

it is posible with XOR “^” operator:

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