#include<iostream>
using namespace std;
/* Pass by value. Creates new variables for formal parameters.
 * Changes not reflected in palce of call
 */
void calc (int num1, int num2)
{
	num1 = num2 + 10;
	num2 = num2% 17;
	
	num1 = num1 -3;
	cout<<"In calc\n";
	cout<<"num1 = "<<num1<<". num2 = "<<num2<<endl;
}

/* Pass by reference. Creates references for formal parameters.
 * Changes are reflected in palce of call
 */
void calcRef (int &num1, int &num2)
{
	num1 = num2 + 10;
	num2 = num2% 17;
	
	num1 = num1 -3;
	cout<<"In calcRef\n";
	cout<<"num1 = "<<num1<<". num2 = "<<num2<<endl;
}

int main()
{
	int var1, var2;
	cout<<"Enter 2 numbers";
	cin>>var1>> var2;
	calc(var1, var2);
	cout<<"In Main\n";
	cout<<"var1 = "<<var1<<". Var2 = "<<var2<<endl;
	calcRef(var1, var2);
	cout<<"In Main\n";
	cout<<"var1 = "<<var1<<". Var2 = "<<var2<<endl;
}