|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* Created by PhpStorm. |
|
4
|
|
|
* User: yiranzai |
|
5
|
|
|
* Date: 19-3-22 |
|
6
|
|
|
* Time: 上午11:02 |
|
7
|
|
|
*/ |
|
8
|
|
|
|
|
9
|
|
|
namespace Yiranzai\Tools; |
|
10
|
|
|
|
|
11
|
|
|
class Math |
|
12
|
|
|
{ |
|
13
|
|
|
|
|
14
|
|
|
/** |
|
15
|
|
|
* 四舍五入 格式化除法 |
|
16
|
|
|
* @param $divisor |
|
17
|
|
|
* @param $divided |
|
18
|
|
|
* @param int $scale |
|
19
|
|
|
* @return int|string |
|
20
|
|
|
*/ |
|
21
|
3 |
|
public static function formatDiv($divisor, $divided, int $scale = 2) |
|
22
|
|
|
{ |
|
23
|
3 |
|
if (empty((int)$divided)) { |
|
24
|
3 |
|
return sprintf('%.' . $scale . 'f', 0); |
|
25
|
|
|
} |
|
26
|
3 |
|
return $scale === 0 ? |
|
27
|
3 |
|
bcdiv($divisor, $divided) : |
|
28
|
3 |
|
sprintf('%.' . $scale . 'f', bcdiv($divisor, $divided, $scale + 1)); |
|
29
|
|
|
} |
|
30
|
|
|
|
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* 四舍五入 格式化取余（模运算） |
|
34
|
|
|
* @param $leftOperand |
|
35
|
|
|
* @param $rightOperand |
|
36
|
|
|
* @return int|string |
|
37
|
|
|
*/ |
|
38
|
3 |
|
public static function formatMod($leftOperand, $rightOperand) |
|
39
|
|
|
{ |
|
40
|
3 |
|
if (empty((int)$rightOperand)) { |
|
41
|
3 |
|
return '0'; |
|
42
|
|
|
} |
|
43
|
3 |
|
return bcmod($leftOperand, $rightOperand); |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
|
|
|
|
47
|
|
|
/** |
|
48
|
|
|
* 四舍五入 格式化乘法 |
|
49
|
|
|
* @param $leftOperand |
|
50
|
|
|
* @param $rightOperand |
|
51
|
|
|
* @param int $scale |
|
52
|
|
|
* @return int|string |
|
53
|
|
|
*/ |
|
54
|
3 |
|
public static function formatMul($leftOperand, $rightOperand, int $scale = 2) |
|
55
|
|
|
{ |
|
56
|
3 |
|
return $scale === 0 ? |
|
57
|
3 |
|
bcmul($leftOperand, $rightOperand) : |
|
58
|
3 |
|
sprintf('%.' . $scale . 'f', bcmul($leftOperand, $rightOperand, $scale + 1)); |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
|
|
62
|
|
|
/** |
|
63
|
|
|
* 四舍五入 格式化减法 |
|
64
|
|
|
* @param $leftOperand |
|
65
|
|
|
* @param $rightOperand |
|
66
|
|
|
* @param int $scale |
|
67
|
|
|
* @return int|string |
|
68
|
|
|
*/ |
|
69
|
3 |
|
public static function formatSub($leftOperand, $rightOperand, int $scale = 2) |
|
70
|
|
|
{ |
|
71
|
3 |
|
return $scale === 0 ? |
|
72
|
3 |
|
bcsub($leftOperand, $rightOperand) : |
|
73
|
3 |
|
sprintf('%.' . $scale . 'f', bcsub($leftOperand, $rightOperand, $scale + 1)); |
|
74
|
|
|
} |
|
75
|
|
|
|
|
76
|
|
|
|
|
77
|
|
|
/** |
|
78
|
|
|
* 四舍五入 格式化加法 |
|
79
|
|
|
* @param $leftOperand |
|
80
|
|
|
* @param $rightOperand |
|
81
|
|
|
* @param int $scale |
|
82
|
|
|
* @return int|string |
|
83
|
|
|
*/ |
|
84
|
3 |
|
public static function formatAdd($leftOperand, $rightOperand, int $scale = 2) |
|
85
|
|
|
{ |
|
86
|
3 |
|
return $scale === 0 ? |
|
87
|
3 |
|
bcadd($leftOperand, $rightOperand) : |
|
88
|
3 |
|
sprintf('%.' . $scale . 'f', bcadd($leftOperand, $rightOperand, $scale + 1)); |
|
89
|
|
|
} |
|
90
|
|
|
|
|
91
|
|
|
/** |
|
92
|
|
|
* 求两个数的最大公约数 |
|
93
|
|
|
* |
|
94
|
|
|
* @param $a |
|
95
|
|
|
* @param $b |
|
96
|
|
|
* @return int |
|
97
|
|
|
*/ |
|
98
|
3 |
|
public static function gcd(int $a, int $b): int |
|
99
|
|
|
{ |
|
100
|
3 |
|
if ($a === 0 || $b === 0) { |
|
101
|
3 |
|
return abs(max(abs($a), abs($b))); |
|
102
|
|
|
} |
|
103
|
|
|
|
|
104
|
3 |
|
$r = $a % $b; |
|
105
|
3 |
|
return ($r !== 0) ? |
|
106
|
3 |
|
self::gcd($b, $r) : |
|
107
|
3 |
|
abs($b); |
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
|
|
/** |
|
111
|
|
|
* 求一个数组的最大公约数 |
|
112
|
|
|
* |
|
113
|
|
|
* @param array $array |
|
114
|
|
|
* @param int $a |
|
115
|
|
|
* @return int |
|
116
|
|
|
*/ |
|
117
|
3 |
|
public static function gcdArray(array $array, $a = 0): int |
|
118
|
|
|
{ |
|
119
|
3 |
|
$b = array_pop($array); |
|
120
|
3 |
|
return ($b === null) ? |
|
121
|
3 |
|
(int)$a : |
|
122
|
3 |
|
self::gcdArray($array, self::gcd($a, $b)); |
|
123
|
|
|
} |
|
124
|
|
|
} |
|
125
|
|
|
|
yiranzai /
php-tools
