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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct A {
  5.   A(int a){cout<<1;}
  6.   A(const A&a = A(1))
  7.           {cout<<2;}
  8.   A(A& a) {cout<<3;}
  9.  ~A()     {cout<<'a';}
  10. };
  11.  
  12.  
  13.  
  14. struct B:  A {
  15.   B(const B& b)
  16.      {cout<<4; }
  17.   B(int i=0):A(*this)
  18.      {cout<<5; }
  19.  ~B(){ cout<<'b';}
  20. }; 
  21.  
  22. int main(){
  23.  {cout<< "start";}
  24.  {cout<<endl; A a(1);}
  25.  {cout<<endl; A a;}
  26.  {cout<<endl; B b;}
  27.   return 0;
  28. }
  29.  
Success #stdin #stdout 0s 5316KB
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stdin
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Standard input is empty
stdout
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start
1a
12aa
35ba
https://ideone.com/e5RYUY
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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