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  1. #include<iostream>
  2. using namespace std;
  3. class A
  4. {
  5. public:
  6.     int a;
  7.     A(int a)
  8.     {
  9.         this->a=a;
  10.     }
  11.  
  12.     virtual void add(int val)
  13.     {
  14.         a += val;
  15.         cout << "Added value of a: " << a << endl;
  16.     }
  17. };
  18. class B : public A
  19. {
  20. public:
  21.     int b;
  22.     B(int a, int b): A(a)
  23.     {
  24.         this->b=b;
  25.     }
  26.     void add(int val) override
  27.     {
  28.         b += val;
  29.         cout << "Added value of b: " << b << endl;
  30.     }
  31. };
  32. class C : public B
  33. {
  34. public:
  35.     int c;
  36.     C(int a, int b, int c): B(a, b)
  37.     {
  38.         this->c=c;
  39.     }
  40. };
  41. void addAVal(A *obj)
  42. {
  43.     int val;
  44.     cin >> val;
  45.     obj->add(val);
  46. }
  47. int main()
  48. {
  49.     A obj(5);
  50.     addAVal(&obj);
  51.     B objb(15, 10);
  52.     addAVal(&objb);
  53.     C objc(1, 20, 25);
  54.     addAVal(&objc);
  55.     return 0;
  56. }
Success #stdin #stdout 0s 5316KB
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stdin
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stdout
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Added value of a: 8
Added value of b: 14
Added value of b: 25
https://ideone.com/HPoNQi
language:
C++ (gcc 8.3)
created:
7 hours ago
visibility:
public

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