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  1. #include <iostream>
  2.     template<unsigned int n> struct Count { bool data[n]; };
  3.     template<int n> struct Counter : public Counter<n-1> {};
  4.     template<> struct Counter<0> {};
  5.     Count<1> GetCount(Counter<1>);
  6.  
  7.     #define MAX_COUNTER_NUM 64
  8.     #define COUNTER_VALUE (sizeof(GetCount(Counter<MAX_COUNTER_NUM + 1>())) / sizeof(bool))
  9.     #define INC_COUNTER Count<COUNTER_VALUE + 1> GetCount(Counter<COUNTER_VALUE + 1>);
  10.  
  11. int main()
  12. {
  13. 	std::cout << "counter = " << COUNTER_VALUE << "\n";
  14. 	INC_COUNTER
  15. 	std::cout << "counter = " << COUNTER_VALUE << "\n";
  16. 	INC_COUNTER
  17. 	std::cout << "counter = " << COUNTER_VALUE << "\n";
  18. 	INC_COUNTER
  19. 	std::cout << "counter = " << COUNTER_VALUE << "\n";
  20. 	INC_COUNTER
  21. 	std::cout << "counter = " << COUNTER_VALUE << "\n";
  22. 	INC_COUNTER
  23. 	std::cout << "counter = " << COUNTER_VALUE << "\n";
  24. }
  25.  
Success #stdin #stdout 0.02s 2724KB
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stdin
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Standard input is empty
stdout
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counter = 1
counter = 2
counter = 3
counter = 4
counter = 5
counter = 6
https://ideone.com/0t0Np
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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