Mega Code Archive
Passing References to Objects
<![CDATA[
#include <iostream>
using namespace std;
class SimpleCat
{
public:
SimpleCat();
SimpleCat(SimpleCat&);
~SimpleCat();
int GetAge() const { return itsAge; }
void SetAge(int age) { itsAge = age; }
private:
int itsAge;
};
SimpleCat::SimpleCat()
{
cout << "Simple Cat Constructor..." << endl;
itsAge = 1;
}
SimpleCat::SimpleCat(SimpleCat&)
{
cout << "Simple Cat Copy Constructor..." << endl;
}
SimpleCat::~SimpleCat()
{
cout << "Simple Cat Destructor..." << endl;
}
const SimpleCat & FunctionTwo (const SimpleCat & theCat);
int main()
{
cout << "Making a cat..." << endl;
SimpleCat Frisky;
cout << "Frisky is " << Frisky.GetAge() << " years old" << endl;
int age = 5;
Frisky.SetAge(age);
cout << "Frisky is " << Frisky.GetAge() << " years old" << endl;
cout << "Calling FunctionTwo..." << endl;
FunctionTwo(Frisky);
cout << "Frisky is " << Frisky.GetAge() << " years old" << endl;
return 0;
}
// functionTwo, passes a ref to a const object
const SimpleCat & FunctionTwo (const SimpleCat & theCat)
{
cout << "Frisky is now " << theCat.GetAge();
return theCat;
}
]]>