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  1. #include <iostream>
  2. #include <ctime>
  3. using std::cout;
  4. using std::endl;
  5.  
  6. enum class func_method {log_or, mult};
  7.  
  8. template <typename test_type, func_method method>
  9. void test_func()
  10. {
  11. 	const unsigned long end = 2000000000;
  12.  
  13. 	volatile test_type x = 0;
  14. 	volatile test_type y = 1;
  15. 	unsigned int sum = 0;
  16.  
  17. 	auto clock_begin = std::clock();
  18. 	if (method == func_method::log_or)
  19. 		for (unsigned long i = 0; i < end; ++i)
  20. 		{
  21. 			test_type a = x;
  22. 			test_type b = y;
  23. 			if (a == 0 || b == 0)
  24. 				++sum;
  25. 		}
  26. 	else if (method == func_method::mult)
  27. 		for (unsigned long i = 0; i < end; ++i)
  28. 		{
  29. 			test_type a = x;
  30. 			test_type b = y;
  31. 			if (a * b == 0)
  32. 				++sum;
  33. 		}
  34. 	else
  35. 		cout << "Invalid method" << endl;
  36. 	auto clock_end = std::clock();
  37.  
  38. 	cout << "sum:  " << sum << endl;
  39. 	cout << "time: " << double(clock_end - clock_begin) / CLOCKS_PER_SEC << endl;
  40. }
  41.  
  42. int main()
  43. {
  44. 	typedef long long test_type;
  45.  
  46. 	test_func<test_type, func_method::mult>();
  47. 	test_func<test_type, func_method::log_or>();
  48.  
  49. 	return 0;
  50. }
Success #stdin #stdout 2.85s 4888KB
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stdin
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Standard input is empty
stdout
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sum:  2000000000
time: 0.918067
sum:  2000000000
time: 1.93048
https://ideone.com/s7wodO
language:
C++14 (clang 8.0)
created:
4 years ago
visibility:
public

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