#include
using std::cout;
using std::endl;
int byValue( int );
void byReference( int & );
int main()
{
int x = 2;
int z = 4;
cout << byValue( x ) << endl;
cout << "x = " << x << endl;
byReference( z );
cout << "z = " << z << endl;
return 0;
}
int byValue( int number )
{
return number *= number;
}
void byReference( int &numberRef )
{
numberRef *= numberRef;
}
4
x = 2
z = 16