PHP5中文手册·Hamming distance -- 追寻梦想＞编程乐园＞PHP 编程

说明

int gmp_hamdist ( resource $a , resource $b )

Returns the hamming distance between a and b . Both operands should be non-negative.

参数

a

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

It should be positive.

b

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

It should be positive.

返回值

A GMP number resource.

范例

Example#1 gmp_hamdist() example


<?php
$ham1 = gmp_init("1001010011", 2);
$ham2 = gmp_init("1011111100", 2);
echo gmp_hamdist($ham1, $ham2) . "\n";

/* hamdist is equivilent to: */
echo gmp_popcount(gmp_xor($ham1, $ham2)) . "\n";
?>

上例将输出：

6
6


	PHP5中文手册 gmp_gcdext gmp_init GMP PHP Manual gmp_hamdist (PHP 4 >= 4.0.4, PHP 5) gmp_hamdist — Hamming distance 说明 int gmp_hamdist ( resource `$a` , resource `$b` ) Returns the hamming distance between `a` and `b` . Both operands should be non-negative. 参数 `a` It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number. It should be positive. `b` It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number. It should be positive. 返回值 A GMP number resource. 范例 Example#1 gmp_hamdist() example `<?php $ham1 = gmp_init("1001010011", 2); $ham2 = gmp_init("1011111100", 2); echo gmp_hamdist($ham1, $ham2) . "\n"; /* hamdist is equivilent to: */ echo gmp_popcount(gmp_xor($ham1, $ham2)) . "\n"; ?>` 上例将输出： 6 6 参见 gmp_popcount() gmp_xor() gmp_gcdext gmp_init GMP PHP Manual

gmp_hamdist

说明

参数

返回值

范例

参见