list1008.cpp

来自「teach yourself C++ in 21 days 第五版」· C++ 代码 · 共 36 行

// Listing 10.8 - The Counter class
// prefix increment operator

#include <iostream>
using namespace std;

class Counter
{
  public:
    Counter();
    ~Counter(){}
    int GetItsVal()const { return itsVal; }
    void SetItsVal(int x) {itsVal = x; }
    void Increment() { ++itsVal; }
    void operator++ () { ++itsVal; }

  private:
    int itsVal;

};

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

int main()
{
   Counter i;
   cout << "The value of i is " << i.GetItsVal() << endl;
   i.Increment();
   cout << "The value of i is " << i.GetItsVal() << endl;
   ++i;
   cout << "The value of i is " << i.GetItsVal() << endl;
   return 0;
}