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  1. #include <iostream>
  2.  
  3. struct X
  4. {
  5.   X(int i)
  6.   {
  7.       x = i;
  8.       std::cerr << "X ctor, x = " << x << std::endl;
  9.   }
  10.   int x;
  11. };
  12.  
  13. void f()
  14. {
  15.   static X ix(0);
  16.   std::cerr << "f(), ix.x = " << ix.x << std::endl;
  17.  
  18.   ++ix.x;
  19.   if (ix.x > 5)
  20.   {
  21.     static X iy(ix.x);
  22.     static X iz(ix);    // copy constructor
  23.   }
  24. }
  25.  
  26. int main()
  27. {
  28.   for ( int i = 0; i < 10; ++i) f();
  29.   return 0;
  30. }
Success #stdin #stdout #stderr 0s 3092KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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X ctor, x = 0
f(), ix.x = 0
f(), ix.x = 1
f(), ix.x = 2
f(), ix.x = 3
f(), ix.x = 4
f(), ix.x = 5
X ctor, x = 6
f(), ix.x = 6
f(), ix.x = 7
f(), ix.x = 8
f(), ix.x = 9
https://ideone.com/Yuc9V4
Advanced CPP: Constructors, destructors
Construction of statics
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
secret

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