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  1. #include <iostream>
  2. struct A {
  3.     bool f(A* a) { std::cout << "true "; return true; }
  4. };
  5. struct B : A {
  6.     bool f(B* b) { std::cout << "false "; return false; }
  7. };
  8. int main() {
  9.     A* a = new A();
  10.     A* ab = new B();
  11.     B* b = new B();
  12.     a->f(a); a->f(ab); a->f(b); // true, true, true
  13.     std::cout << std::endl;
  14.     ab->f(a); ab->f(ab); ab->f(b); // true, true, true
  15.     std::cout << std::endl;
  16.     b->A::f(a); b->A::f(ab); b->f(b); // true true false
  17.     std::cout << std::endl;
  18. }
Success #stdin #stdout 0s 3028KB
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stdin
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Standard input is empty
stdout
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true true true 
true true true 
true true false
https://ideone.com/mLZKzM
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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