list0913.cpp

来自「teach yourself C++ in 21 days 第五版」· C++ 代码 · 共 41 行

// Listing 9.13
// Returning a reference to an object
// which no longer exists
  
#include <iostream>
  
class SimpleCat
{
   public:
     SimpleCat (int age, int weight);
     ~SimpleCat() {}
     int GetAge() { return itsAge; }
     int GetWeight() { return itsWeight; }
   private:
     int itsAge;
     int itsWeight;
};
  
SimpleCat::SimpleCat(int age, int weight)
{
    itsAge = age;
    itsWeight = weight;
}
  
SimpleCat &TheFunction();
  
int main()
{
    SimpleCat &rCat = TheFunction();
    int age = rCat.GetAge();
    std::cout << "rCat is " << age << " years old!" << std::endl;
    return 0;
}
  
SimpleCat &TheFunction()
{
    SimpleCat Frisky(5,9);
    return Frisky;
}