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  1. #include <iostream>
  2.  
  3. struct Base {
  4.   enum Type {
  5.     FOO = 0,
  6.     BAR = 1
  7.   };
  8.   virtual ~Base() {}
  9.   virtual Type type() const = 0;
  10.   int value_;
  11. };
  12.  
  13. struct Foo : Base { 
  14.     Foo() { value_ = 33; }
  15.     virtual Type type() const { return FOO; }
  16. };
  17.  
  18. struct Bar : Base { 
  19.     Bar() { value_ = 44; }
  20.     virtual Type type() const { return BAR; }
  21. };
  22.  
  23. int main() {
  24.     Foo foo;
  25.     Bar bar;
  26.     Base & b = foo;
  27.     std::cout << b.type() << ", " << b.value_ << "\n";
  28.     b = bar;
  29.     std::cout << b.type() << ", " << b.value_ << "\n";
  30.     return 0;
  31. }
  32.  
Success #stdin #stdout 0.02s 2680KB
comments (?)
stdin
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Standard input is empty
stdout
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0, 33
0, 44
https://ideone.com/ULGqjW
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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