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  1. #include <iostream>
  2. #include <memory>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. class A {
  7. public:
  8.     int va1;
  9.     int va2;
  10.     string va3;
  11.  
  12.     virtual void fa1(int x1, string x2) {  }
  13.     int fa2 (bool y1, double y2) { cout <<"call A::fa2()"<<endl;}
  14.     A() { }
  15.     virtual ~A() { }
  16. };
  17. class B : public A {
  18. public:
  19.     bool ab1;
  20.     double ab2;
  21.     long double ab3;
  22.  
  23.     bool fb1(double x1) { }
  24.     long double fb2() { cout << "call B::fb2()"<<endl;}
  25.     B(int z1) : ab2(z1) { }
  26.     virtual ~B() { }
  27. };
  28. class C : public A {
  29. public:
  30.     int ac1;
  31.  
  32.     long double fc1() {   }
  33.     virtual void fa1(int x1, string x2) {  }
  34.     C() { }
  35.     virtual ~C() { }
  36. };
  37.  
  38. int main() {
  39. 	vector<shared_ptr<A>> v;  
  40.  
  41. 	v.push_back(make_shared<A>());
  42. 	v.push_back(make_shared<B>(2));
  43. 	v.push_back(make_shared<C>());
  44.  
  45. 	for (shared_ptr<A> pa : v) { 
  46. 		pa->fa2(true,0.07);
  47. 	    shared_ptr<B> pb = dynamic_pointer_cast<B>(pa); 
  48. 	    if (pb) {
  49. 	    	cout << "Object is also a B"<<endl;
  50. 		    pb->fb2(); 
  51. 	    } else cout << "Object is not a B"<<endl; 
  52. 	    cout <<endl; 
  53. 	}
  54.  
  55. 	return 0;
  56. }
Success #stdin #stdout 0s 3280KB
comments (?)
stdin 
Standard input is empty
stdout 
call A::fa2()
Object is not a B

call A::fa2()
Object is also a B
call B::fb2()

call A::fa2()
Object is not a B
https://ideone.com/i1yRJi
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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