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  1. #include <iostream>
  2. #include <iomanip>
  3.  
  4. using namespace std;
  5.  
  6. class Random64
  7. {
  8. typedef unsigned long long uint64;
  9. public:
  10.     typedef uint64 RandomValue;
  11.     Random64& operator = (uint64 seed) { X = seed; return *this; }
  12.     Random64(uint64 seed = 0):X(seed){};
  13.     uint64 operator()(uint64 seed = uint64(-1))
  14.     {
  15.         const uint64 a = 3202034522624059733ULL;
  16.         const uint64 c =                   1ULL;
  17.  
  18.         if (seed != uint64(-1)) X = seed;
  19.         uint64 Y = a * X + c;
  20.         X = a * Y + c;
  21.         Y = (Y&0xFFFFFFFF00000000ULL) | (X >> 32);
  22.         return Y;
  23.     }
  24.     // Не включая max
  25.     uint64 operator()(uint64 min, uint64 max)
  26.     {
  27.         return (*this)()%(max-min) + min;
  28.     }
  29. private:
  30.     uint64 X;
  31. };
  32.  
  33. int main(int argc, const char * argv[])
  34. {
  35.     Random64 r(time(0));
  36.  
  37.     for(int i = 0; i < 100; ++i)
  38.         cout << hex << setfill('0') << setw(16) << r() << endl;
  39. }
  40.  
Success #stdin #stdout 0s 4556KB
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stdin
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Standard input is empty
stdout
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https://ideone.com/qQDy6V
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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