4.10-指针传递对象.cpp

Visual C++的课件

//Listing 9.10
// Passing pointers to objects

#include <iostream.h>

class SimpleCat
{
public:
	SimpleCat ();                    // constructor
	SimpleCat(SimpleCat&);     // copy constructor
	~SimpleCat();                    // destructor
};

SimpleCat::SimpleCat()
{
	cout << "Simple Cat Constructor...\n";
}

SimpleCat::SimpleCat(SimpleCat&)
{
	cout << "Simple Cat Copy Constructor...\n";
}

SimpleCat::~SimpleCat()
{
	cout << "Simple Cat Destructor...\n";
}

SimpleCat FunctionOne (SimpleCat theCat);
SimpleCat* FunctionTwo (SimpleCat *theCat);

int main()
{
	cout << "Making a cat...\n";
	SimpleCat Frisky;
	cout << "Calling FunctionOne...\n";
	FunctionOne(Frisky);
	cout << "Calling FunctionTwo...\n";
	FunctionTwo(&Frisky);
	return 0;
}

// FunctionOne, passes by value
SimpleCat FunctionOne(SimpleCat theCat)
{
	cout << "Function One. Returning...\n";
	return theCat;
}

// functionTwo, passes by reference
SimpleCat* FunctionTwo (SimpleCat  *theCat)
{
	cout << "Function Two. Returning...\n";
	return theCat;
}