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  1. #include <iostream>
  2. #include <stdexcept>
  3. #include <iomanip>
  4. using namespace std;
  5.  
  6.  
  7. struct vantuz
  8. {
  9.    vantuz& push();
  10.    vantuz& pull();
  11.    vantuz();
  12. private:
  13.    bool pushed;
  14. };
  15.  
  16. vantuz::vantuz():pushed(false)
  17. {
  18. }
  19.  
  20. vantuz& vantuz::push()
  21. {
  22.         if(pushed)
  23.         {
  24.               throw logic_error("already pushed!");
  25.         }
  26.         pushed=!pushed;
  27. 		cout<<"push! ";
  28.         return *this;
  29. }
  30.  
  31. vantuz& vantuz::pull()
  32. {
  33.     pushed=!pushed;
  34.     if(pushed)
  35.     {
  36.           throw logic_error("already pulled!");
  37.     }
  38.    cout<<"pull! ";
  39.    return *this;
  40. }
  41.  
  42. int main()
  43. {
  44.    try
  45.    {
  46.       vantuz v;
  47.       v.push().pull().push().pull().push().pull().push().pull();
  48.    }
  49.    catch(logic_error& ex)
  50.    {
  51.    	  cout<<endl<<setw(20)<<setfill('@')<<' '<<"Runtime error!"<<setw(20)<<setfill('@')<<' '<<endl<<ex.what()<<endl;
  52.    	  throw;
  53.    }
  54.    return 0;
  55. }
Success #stdin #stdout 0s 3144KB
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stdin
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Standard input is empty
stdout
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push! pull! push! pull! push! pull! push! pull!
https://ideone.com/OrlLNA
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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