#include <iostream>
using namespace std
//pointer in parameter 
//myPtrAsParam1.cpp
void get_num(int *);
void alter_num(int *);

int main()
{
	int num;
	get_num(&num); 
	cout<<"\n get_num " << num  << "  at" << &num; 
	alter_num(&num);
	cout<<"\n alter_num " << num  << "  at" << &num; 
	
 return 0;
}
void get_num(int * x)
{
	cout<<"\n Enter an integer";
	cin>> *x; 
	

}

void alter_num(int * y)
{

	*y += 20; 
}