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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. class A
  6. {
  7.     public:
  8.         A()
  9.         {
  10.             cout<<"A init"<<endl;
  11.             showptr();
  12.             cout<<"throwing..."<<endl;
  13.             throw 1;
  14.         }
  15.         ~A()
  16.         {
  17.             cout<<"A deinit"<<endl;
  18.             showptr();
  19.         }
  20.  
  21.         void showptr()
  22.         {
  23.             cout<<"A "<<this<<endl;
  24.         }
  25. };
  26.  
  27. class B
  28. {
  29.     public:
  30.         B() : ClassChain(NULL)
  31.         {
  32.             ClassChain = new A;
  33.             cout<<"B init"<<endl;
  34.             showptr();
  35.         }
  36.         ~B()
  37.         {
  38.             cout<<"B deinit"<<endl;
  39.             showptr();
  40.             delete ClassChain;
  41.             ClassChain = NULL;
  42.         }
  43.  
  44.         A* ClassChain;
  45.  
  46.         void showptr()
  47.         {
  48.             cout<<"B "<<this<<endl;
  49.         }
  50. };
  51.  
  52. int main()
  53. {
  54.     B* myClass = NULL;
  55.     try
  56.     {
  57.         myClass = new B;
  58.     }
  59.     //guaranteed throw
  60.     catch(int)
  61.     {
  62.         delete myClass;
  63.         myClass = NULL;
  64.     }
  65.     return 0;
  66. }
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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A init
A 0x9738018
throwing...
https://ideone.com/GMGIlc
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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