#include <stdio.h>

void foo(int &num)
{
	num++;
}

void bar(int *num)
{
	(*num)++;
}

int main()
{
	int a = 5;
	int *b =& a;

	printf("%d\n", a);
	printf("%d\n", *b);
	
	foo(a);
	printf("%d\n", a);

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

	bar(&a);
	printf("%d\n", a);
	
	return 0;
}