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  1. #include <iostream>
  2.  
  3. void passPtrByReference( int*& ptrByRef )
  4. {
  5.     ptrByRef = reinterpret_cast<int*>(1) ;
  6. }
  7.  
  8. void passPtrByValue( int* ptrByVal )
  9. {
  10.     ptrByVal = reinterpret_cast<int*>(2) ;
  11. }
  12.  
  13. int main()
  14. {
  15.     int * ptr = 0 ;
  16.     std::cout << ptr << '\n' ;
  17.  
  18.     passPtrByReference(ptr) ;
  19.     std::cout << ptr << '\n' ;
  20.  
  21.     passPtrByValue(ptr) ;
  22.     std::cout << ptr << '\n' ;
  23. }
Success #stdin #stdout 0s 2896KB
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https://ideone.com/ZR3Rdv
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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