#include <stdio.h>

//scambia
void scambia(int a,int b) {
	int t;
	printf("\tF %d %d\n",a,b);
	t=a;
	a=b;
	b=t;
	printf("\tF %d %d\n",a,b);
}
void scambia1(int* a, int* b) {
	int t;
	printf("\tF %d %d\n",*a,*b);
	 t = *a;
	*a = *b;
	*b = t;
	printf("\tF %d %d\n",*a,*b);
}
void scambia2(int* a, int* b) {
	int t;
	printf("\tF %p %p\n",a,b);
	 t = *a;
	*a = *b;
	*b = t;
	printf("\tF %p %p\n",a,b);
}


//main
int main(void) {
	//variabili
	int a;
	int b;
	//esecuzione
	a=3; b=7;
	printf("M: %d %d\n",a,b);
	scambia(a,b);
	printf("M: %d %d\n",a,b);
	scambia1(&a,&b);
	printf("M: %d %d\n",a,b);
	printf("M: %p %p\n",&a,&b);
	scambia2(&a,&b);
	printf("M: %p %p\n",&a,&b);
	printf("M: %d %d\n",a,b);
	//fine	
	return 0;
}