#include <stdio.h>

void tausche_intPtr(int** a, int** b) {
	int* tmp = *a;
	*a = *b;
	*b = tmp;
}

void tausche_int(int* a, int* b) {
	int tmp = *a;
	*a = *b;
	*b = tmp;
}

int main(void) {
	int i = 1;
	int j = 2;

	printf("i = %d, j = %d\n", i, j);
	tausche_int(&i, &j);
	printf("i = %d, j = %d\n", i, j);

	int* a = &i;
	int* b = &j;

	printf("*a = %d, *b = %d\n", *a, *b);
	tausche_intPtr(&a, &b);
	printf("*a = %d, *b = %d\n", *a, *b);

	return 0;
}