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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template <class T>
  5. class Exponentiation
  6. {
  7.     public:
  8.     Exponentiation() {};
  9.     virtual ~Exponentiation() {};
  10.  
  11.     // computes C = A^n
  12.     virtual void power() = 0;
  13. };
  14.  
  15. template <class T>
  16. class ExpA : public Exponentiation<T>
  17. {
  18.     public:
  19.     ExpA() {};
  20.     ~ExpA() {};
  21.  
  22.     void power () override { cout<<"power A\n"; }
  23. };
  24.  
  25. template <class T>
  26. class ExpB : public Exponentiation<T>
  27. {
  28.     protected:
  29.     //var1;
  30.     //var2;
  31.  
  32.     public:
  33.     ExpB() {};
  34.     ~ExpB() {};
  35.  
  36.     void func1(){ cout<<"f1\n"; }
  37.     void func2(){ cout<<"f2\n"; }
  38.     void power () override { cout<<"power B\n"; };
  39. };
  40.  
  41. template <class T, template <class U> class Exp>
  42. void performExp(Exp<T>& obj)
  43. {
  44.      obj.power();
  45. }
  46. template <class T>
  47. void performExp(ExpB<T>& obj)
  48. {
  49.      obj.func1();
  50.      obj.func2(); 
  51.      obj.power();
  52. }
  53.  
  54. int main() {
  55. 	ExpA<long> a;
  56. 	performExp(a);
  57.  
  58. 	ExpB<long> b; 
  59. 	performExp(b);
  60. 	// your code goes here
  61. 	return 0;
  62. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin 
Standard input is empty
stdout 
power A
f1
f2
power B
https://ideone.com/Jq0KHQ
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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