#include <iostream>
#include <cstdlib>
using namespace std;

void f(int *p, const int *q);

int main()
{
	int a[] = {10, 20, 30};
	int b[] = {40, 50, 60};

	f(a, b);
	return EXIT_SUCCESS;
}

void f(int *p, const int *q)
{
	p[0] = 70;     //change the 10 to 70
	//q[0] = 80;   //won't compile: try to change the 40 to 80
}