数据结构&算法(PHP描述) 三元组 Triplet

数据结构&算法(PHP描述) 三元组 Triplet

1. /**
2. * 三元组 Triplet
3. */
4. class Triplet
5. {
6. private $_data = null;
7. // 初始化三元组
8. public function init($val1, $val2, $val3)
9. {
10. $this -> _data[0] = $val1;
11. $this -> _data[1] = $val2;
12. $this -> _data[2] = $val3;
13. return true;
14. }
15. // 销毁三元组
16. public function destroy()
17. {
18. unset($this -> _data);
19. return true;
20. }
21. // 返回第$key的值
22. public function get($key)
23. {
24. if ($key 3) return false;
25. return$this -> _data[$key-1];
26. }
27. // 设置第$key元的值为$val
28. public function put($key, $val)
29. {
30. if ($key 3) return false;
31. $this -> _data[$key-1] = $val;
32. return true;
33. }
34. // 是否按升序排序
35. public function isAscending()
36. {
37. return ($this -> _data[0] _data[1]) && ($this -> _data[1] _data[2]);
38. }
39. // 是否按降序排序
40. public function isDescending()
41. {
42. return ($this -> _data[0] >= $this -> _data[1]) && ($this -> _data[1] >= $this -> _data[2]);
43. }
44. // 获取最大值
45. public function max()
46. {
47. return ($this -> _data[0] >= $this -> _data[1])? ($this -> _data[0] >= $this -> _data[2])?$this -> _data[0] :$this -> _data[2] : ($this -> _data[1] >= $this -> _data[2])?$this -> _data[1] :$this -> _data[2];
48. }
49. // 获取最小值
50. public function min()
51. {
52. return ($this -> _data[0] _data[1])? ($this -> _data[0] _data[2])?$this -> _data[0] :$this -> _data[2] : ($this -> _data[1] _data[2])?$this -> _data[1] :$this -> _data[2];
53. }
54. }
56. $objTriplet = new Triplet();
57. echo"init:";
58. var_dump($objTriplet -> init(1, 2, 3));
59. echo"
    ";
61. echo"get 1:";
62. var_dump($objTriplet -> get(1));
63. echo"
    ";
64. echo"get 4:";
65. var_dump($objTriplet -> get(4));
66. echo"
    "; // false
67. echo"put 3,4:";
68. var_dump($objTriplet -> put(3, 4));
69. echo"
    ";
71. echo"max:";
72. var_dump($objTriplet -> max());
73. echo"
    ";
74. echo"min:";
75. var_dump($objTriplet -> min());
76. echo"
    ";
78. echo"isAscending:";
79. var_dump($objTriplet -> isAscending());
80. echo"
    ";
81. echo"isDescending:";
82. var_dump($objTriplet -> isDescending());
83. echo"
    ";
85. ?>

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