counterconvertint.cpp

24学时攻克C++光盘源代码 深入浅出 方便实用

 // Listing 14.9
 // conversion operator
 #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;
 }