pointeurs.c

#include <stdio.h>

void echange(int x, int y)
{
  int z;

  z = x;
  x = y;
  y = z;
}

int main()
{
  int a = 1;
  int b = 2;

  printf("a = %d; b = %d\n", a, b);
  echange(a, b);
  printf("a = %d; b = %d\n", a, b);

  return 0;
}