list1017.cpp

teach yourself C++ in 21 days 第五版

// Listing 10.17 - Constructor as conversion operator

#include <iostream>

using namespace std;

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

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

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

int main()
{
   int theInt = 5;
   Counter theCtr = theInt;
   cout << "theCtr: " << theCtr.GetItsVal() << endl;
   return 0;
}