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  1. class A
  2. {
  3. /* ... */
  4. public:
  5.    virtual int method1(int x) = 0;
  6.  
  7.    virtual ~A() {}
  8. };
  9.  
  10. class B : public A
  11. {
  12.     /* ... */
  13. public:
  14.     virtual int method1(int x) {
  15.        return method2(x);
  16.     }
  17.     virtual int method2(int y) {
  18.        return y;
  19.     }
  20.     /* ... */
  21. };
  22.  
  23. class C : public virtual B
  24. {
  25.     /* ... */
  26. };
  27.  
  28. class D : public B
  29. {
  30.     /* ... */
  31. public:
  32.     virtual int method2(int y) {
  33.        return y * 2;
  34.     }
  35.     /* ... */
  36. };
  37.  
  38.  
  39. #include <iostream>
  40. #include <memory>
  41.  
  42.  
  43. int main() {
  44.    std::auto_ptr<A> const b(new B);
  45.    std::cout << b->method1(1) << std::endl;
  46.  
  47.    std::auto_ptr<A> const d(new D);
  48.    std::cout << d->method1(1) << std::endl;
  49. }
Success #stdin #stdout 0s 3428KB
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https://ideone.com/1P7JmZ
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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