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  1. #include <iostream>
  2.  
  3.  
  4. int* alloc( int n )
  5. {
  6.     std::cout << "alloc size " << n << std::endl;
  7.     return new int[n];
  8. }
  9.  
  10. class A
  11. {
  12.     int *a;
  13.      int n;
  14. public:
  15.     //A(int x): a(new int[n]), n(x) 
  16.     A(int x): a( alloc(n) ), n(x) 
  17.     {
  18.         a[n-1] = 111;
  19.     }
  20.     void showSize()
  21.     {
  22.         std::cout << a[n - 1] << '\n';
  23.     }
  24. };
  25.  
  26. int main()
  27. {
  28.     A a(10);
  29.     a.showSize();
  30. }
  31.  
Success #stdin #stdout 0s 2984KB
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stdin
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Standard input is empty
stdout
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alloc size 0
111
https://ideone.com/XtbyYq
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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