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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. const int id_max = 7e7, s_max = (1 << 17)-1, x_max = 2;
  6.  
  7. class data_tuple
  8. {
  9. 	struct bit_fields
  10. 	{
  11. 		uint64_t id: 27;
  12. 		uint64_t s1: 17;
  13. 		uint64_t s2: 17;
  14. 		uint64_t  x:  2;
  15. 		uint64_t  u:  1; 
  16. 	};
  17.  
  18. 	union 
  19. 	{
  20. 		uint64_t      key;
  21. 		bit_fields   data;
  22. 	};
  23.  
  24. 	static inline uint64_t score_to_int(double s)
  25. 	{
  26. 		return round(s *= s_max);
  27. 	}
  28.  
  29. 	static inline double int_to_score(int s)
  30. 	{
  31. 		return double(s)/s_max; 
  32. 	}
  33.  
  34. public:
  35. 	void set_id(int id)
  36. 	{
  37. 		data.id = id;
  38. 	}
  39.  
  40. 	void set_score1(double x)
  41. 	{
  42. 		data.s1 = score_to_int(x);
  43. 	}
  44.  
  45. 	void set_score2(double x)
  46. 	{
  47. 		data.s2 = score_to_int(x);
  48. 	}
  49.  
  50. 	void set_x(int x)
  51. 	{
  52. 		data.x = x; 
  53. 	}
  54.  
  55. 	int get_id() const 
  56. 	{
  57. 		return data.id; 
  58. 	}
  59.  
  60. 	double get_score1() const
  61. 	{
  62. 		return int_to_score(data.s1); 
  63. 	}
  64.  
  65. 	double get_score2() const
  66. 	{
  67. 		return int_to_score(data.s2);
  68. 	}
  69.  
  70. 	int get_x() const
  71. 	{
  72. 		return data.x;
  73. 	}
  74.  
  75. 	data_tuple(int id = 0, double s1 = 0, double s2 = 0, int x = 0, int u = 0) 
  76. 	{
  77. 		data.id = id, 
  78. 		data.s1 = score_to_int(s1), 
  79. 		data.s2 = score_to_int(s2), 
  80. 		data.x  = x,
  81. 		data.u  = u;
  82. 	}
  83.  
  84. 	friend istream& operator>>(istream& in, data_tuple& a)
  85. 	{
  86. 		int id, x; double s1, s2;
  87.  
  88. 		in >> id >> s1 >> s2 >> x,
  89. 		a.data.id = id,
  90. 		a.set_score1(s1),
  91. 		a.set_score2(s2),
  92. 		a.data.x = x;
  93.  
  94. 		return in; 
  95. 	}
  96.  
  97. 	static inline ostream& 
  98. 		write(ostream& out, int id, double s1, double s2, int x)
  99. 	{
  100. 		out << id << ' ',
  101. 		out << fixed << setprecision(5) << s1 << ' ',
  102. 		out << fixed << setprecision(5) << s2 << ' ',
  103. 		out << x;	
  104.  
  105. 		return out; 
  106. 	}
  107.  
  108. 	friend ostream& operator<<(ostream& out, const data_tuple& a)
  109. 	{
  110. 		return write(out,a.data.id,a.get_score1(),a.get_score2(),a.data.x);
  111. 	}
  112.  
  113. 	uint64_t hash_key() const
  114. 	{
  115. 		return key; 
  116. 	}
  117. };
  118.  
  119. int main() 
  120. {
  121. 	srand(time(NULL));
  122.  
  123. 	int 	id = 1+(rand()%id_max);
  124. 	double	s1 = double(rand()%(s_max+1))/s_max;
  125. 	double	s2 = double(rand()%(s_max+1))/s_max;
  126. 	int		x  = rand()%(x_max+1);
  127.  
  128. 	data_tuple a(id,s1,s2,x), b; 
  129.  
  130. 	cin >> b,
  131. 	cout << "testing 64-bit data_tuple" << endl,
  132. 	cout << "randomly generated tuple"  << endl,
  133. 	data_tuple::write(cout,id,s1,s2,x), cout << endl, 
  134. 	cout << a << endl,
  135. 	cout << a.hash_key() << endl,
  136. 	cout << "input tuple" << endl, 
  137. 	cout << b << endl,
  138. 	cout << b.hash_key() << endl, 
  139. 	cout << "data_tuple size = " << 8*sizeof(a) << " bits";
  140. }
Success #stdin #stdout 0s 15240KB
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stdin
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22 0.222 0.2222 2
stdout
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testing 64-bit data_tuple
randomly generated tuple
19307685 0.35630 0.38342 0
19307685 0.35630 0.38342 0
884101577649331365
input tuple
22 0.22200 0.22220 2
5124044750252408854
data_tuple size = 64 bits
https://ideone.com/C08L9O
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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