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english/basic_content/virtual/set3/copy_consrtuct.cpp
40 строк
723 B
xliu79
english
19 июл 2020, 05:38
19 июл 2020, 05:38
2bdeea8
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#include <iostream> using namespace std; class Base { public: }; class Derived : public Base { public: Derived() { cout << "Derived created" << endl; } Derived(const Derived &rhs) { cout << "Derived created by deep copy" << endl; } ~Derived() { cout << "Derived destroyed" << endl; } }; int main() { Derived s1; Derived s2 = s1; // Compiler invokes "copy constructor" // Type of s1 and s2 are concrete to compiler // How can we create Derived1 or Derived2 object // from pointer (reference) to Base class pointing Derived object? return 0; }