datamemberptr.cpp

24小时攻克C++课本中的程序

 // Listing 10.3
 // Pointers as data members
 #include <iostream>
 
 class SimpleCat
 {
 public:
     SimpleCat();
     ~SimpleCat();
     int GetAge() const { return *itsAge; }
     void SetAge(int age) { *itsAge = age; }
 
     int GetWeight() const { return *itsWeight; }
     void setWeight (int weight) { *itsWeight = weight; }
 
 private:
     int * itsAge;
     int * itsWeight;
 };
 
 SimpleCat::SimpleCat()
 {
     itsAge = new int(2);
     itsWeight = new int(5);
 }
 
 SimpleCat::~SimpleCat()
 {
     delete itsAge;
     delete itsWeight;
 }
 
 int main()
 {
     SimpleCat *Frisky = new SimpleCat;
     std::cout << "Frisky is " << Frisky->GetAge() 
               << " years old\n";
 
     Frisky->SetAge(5);
     std::cout << "Frisky is " << Frisky->GetAge() 
               << " years old\n";
 
     delete Frisky;
     return 0;
 }