Mega Code Archive
Copy constructors
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#include <iostream>
class MyClass
{
public:
MyClass(); // default constructor
MyClass (const MyClass &); // copy constructor
~MyClass(); // destructor
int GetAge() const { return *itsAge; }
int GetWeight() const { return *itsWeight; }
void SetAge(int age) { *itsAge = age; }
private:
int *itsAge;
int *itsWeight;
};
MyClass::MyClass()
{
itsAge = new int;
itsWeight = new int;
*itsAge = 5;
*itsWeight = 9;
}
MyClass::MyClass(const MyClass & rhs)
{
itsAge = new int;
itsWeight = new int;
*itsAge = rhs.GetAge();
*itsWeight = rhs.GetWeight();
}
MyClass::~MyClass()
{
delete itsAge;
itsAge = 0;
delete itsWeight;
itsWeight = 0;
}
int main()
{
MyClass myObject;
std::cout << "myObject's age: " << myObject.GetAge() << "\n";
std::cout << "Setting myObject to 6...\n";
myObject.SetAge(6);
std::cout << "Creating secondObject from myObject\n";
MyClass secondObject(myObject);
std::cout << "myObject's age: " << myObject.GetAge() << "\n";
std::cout << "secondObject' age: " << secondObject.GetAge() << "\n";
std::cout << "setting myObject to 7...\n";
myObject.SetAge(7);
std::cout << "myObject's age: " << myObject.GetAge() << "\n";
std::cout << "boot's age: " << secondObject.GetAge() << "\n";
return 0;
}
myObject's age: 5
Setting myObject to 6...
Creating secondObject from myObject
myObject's age: 6
secondObject' age: 6
setting myObject to 7...
myObject's age: 7
boot's age: 6
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