Szathmáry László honlapja @ DEIK

Python style

(1) Python style
a = 3 b = 5 print((a, b)) # (3, 5) a, b = b, a print((a, b)) # (5, 3)	var a = 3 b = 5 echo (a, b) # (3, 5) (a, b) = (b, a) # Parentheses are obligatory! echo (a, b) # (5, 3)

C style

(2) C style
#include <stdio.h> void swap(int p1, int p2) { int tmp = p1; p1 = p2; p2 = tmp; } int main() { int a = 3; int b = 5; printf("%d, %d\n", a, b); // 3, 5 swap(&a, &b); printf("%d, %d\n", a, b); // 5, 3 return 0; }	var a = 3 b = 5 echo (a, b) # (3, 5) swap(a, b) echo (a, b) # (5, 3)

Notes

If you just want to swap the values of two variables, use the swap() function.

If you want to do something fancier, like calculating the next Fibonacci number, use the tuple trick: (a, b) = (b, a+b) . The right side is evaluated first and then parallel assignment happens, just like in Python.

Swap

Python style

C style

Notes