4elist1018.cpp

《21天学通C＋＋》附盘的原代码。书上的每个例子在这里都有相应的C语言程序。

// Listing 10.18 - Conversion Operators

#include <iostream>

class Counter
{
public:
	Counter();
	Counter(int val);
	~Counter(){}
	int GetItsVal()const { return itsVal; }
	void SetItsVal(int x) {itsVal = x; }
	operator unsigned short();
private:
	int itsVal;

};

Counter::Counter():
itsVal(0)
{}

Counter::Counter(int val):
itsVal(val)
{}

Counter::operator unsigned short ()
{
	return ( int (itsVal) );
}

int main()
{
	Counter ctr(5);
	int theShort = ctr;
	std::cout << "theShort: " << theShort << std::endl;
	return 0;
}