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  1. # include <iostream>
  2. # include <random>
  3. # include <type_traits>
  4. # include <ctime>
  5.  
  6. namespace detail {
  7. 	template <typename tType>
  8. 	struct Select_DistT {
  9. 		typedef typename std::conditional<
  10. 			std::is_integral<tType>::value,
  11. 			std::uniform_int_distribution<tType>,
  12. 			std::uniform_real_distribution<tType>
  13. 			>::type type;
  14. 	};
  15. }
  16.  
  17. template<typename tType, class DistT = typename detail::Select_DistT<tType>::type>
  18. class Random
  19. {
  20.     std::default_random_engine              mEngine;
  21.     DistT									mDistribution;
  22. public:
  23.     Random(tType iMin, tType iMax) :
  24.         mEngine(time(nullptr)),
  25.         mDistribution(iMin, iMax)
  26.     { }
  27.  
  28.     tType operator()()
  29.     {
  30.         return mDistribution(mEngine);
  31.     }
  32. };
  33.  
  34. int main()
  35. {
  36.     Random<int> aRandomInt(0, 4);
  37.     for(int i=0; i < 10; ++i)
  38.     {
  39.         std::cout << aRandomInt() << '\n';
  40.     }
  41.  
  42.     Random<double> aRandomDouble(0, 4);
  43.     for(int i=0; i < 10; ++i)
  44.     {
  45.         std::cout << aRandomDouble() << '\n';
  46.     }
  47.  
  48.     return 0;
  49. }
  50.  
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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2
1
0
3
3
1
1
1
3
2
1.24878
2.82828
0.958006
1.27204
1.73492
0.484948
3.75761
0.678754
2.62261
1.05893
https://ideone.com/W8K68u
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
secret

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