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  1. #include <iostream>
  2.  
  3. //normaly this is MIT Lisence for any use.
  4. //ja.wikipedia.org/wiki/MIT_License
  5.  
  6. //OR
  7.  
  8. //if you read japanese text.i agree to NYSL Version 0.9982
  9. //www.kmonos.net/nysl/
  10.  
  11. template<class T>
  12. class Number_Range{
  13. 	T B = 0;
  14. 	T E = 0;
  15. 	T S = 1;
  16.  
  17. public:
  18. 	struct Number_Range_Iterator {
  19. 		T N = 0;
  20. 		T S = 1;
  21. 		Number_Range_Iterator() = delete;
  22. 		Number_Range_Iterator(const T& Number,const T& Step = 1) :N(Number),S(Step) {}
  23.  
  24. 		operator T& () {
  25. 			return N;
  26. 		}
  27. 		T& operator *() {
  28. 			return N;
  29. 		}
  30. 		T& operator ++() {
  31. 			N += S;
  32. 			return N;
  33. 		}
  34. 		bool operator != (const T& rhs) {
  35. 			return S > 0 ? (N < rhs):(N > rhs);
  36. 		}
  37. 	};
  38. 	Number_Range() = delete;
  39. 	Number_Range(const T& Begin, const T& End, const T& Step = 1) :B(Begin), E(End), S(Step) {}
  40. 	Number_Range(const T& End) :B(0), E(End), S(End>0?1:-1) {}
  41. 	Number_Range_Iterator begin() {
  42. 		return Number_Range_Iterator(B,S);
  43. 	}
  44. 	Number_Range_Iterator end(){
  45. 		return Number_Range_Iterator(E,S);
  46. 	}
  47.  
  48.  
  49. };
  50.  
  51. int main() {
  52. 	for (auto&o : Number_Range<int>(0, 10)) {
  53. 		std::cout << o << ' ';
  54. 	}	std::cout << std::endl;
  55.  
  56. 	for (auto&o : Number_Range<int>(10)) {
  57. 		std::cout << o << ' ';
  58. 	}
  59. 	std::cout << std::endl;
  60. 	for (auto&o : Number_Range<int>(100,110,2)) {
  61. 		std::cout << o << ' ';
  62. 	}
  63. 	std::cout << std::endl;
  64. 	for (auto&o : Number_Range<int>(100,110,3)) {
  65. 		std::cout << o << ' ';
  66. 	}
  67. 	std::cout << std::endl;
  68. 	for (auto&o : Number_Range<int>(-10)) {
  69. 		std::cout << o << ' ';
  70. 	}
  71. 	std::cout << std::endl;
  72. 	for (auto&o : Number_Range<int>(0,-10,-3)) {
  73. 		std::cout << o << ' ';
  74. 	}
  75. 	std::cout << std::endl;
  76. 	return 0;
  77. }
  78.  
Success #stdin #stdout 0s 3412KB
comments (?)
stdin
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Standard input is empty
stdout
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0 1 2 3 4 5 6 7 8 9 
0 1 2 3 4 5 6 7 8 9 
100 102 104 106 108 
100 103 106 109 
0 -1 -2 -3 -4 -5 -6 -7 -8 -9 
0 -3 -6 -9
https://ideone.com/C6TCiG
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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