php教程

gmp_scan0

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gmp_scan0Scan for 0

说明

gmp_scan0 ( GMP $a , int $start ) : int

Scans a, starting with bit start, towards more significant bits, until the first clear bit is found.

参数

a

The number to scan.

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

start

The starting bit.

返回值

Returns the index of the found bit, as an integer. The index starts from 0.

范例

Example #1 gmp_scan0() example

<?php
// "0" bit is found at position 3. index starts at 0
$s1 gmp_init("10111"2);
echo 
gmp_scan0($s10) . "\n";

// "0" bit is found at position 7. index starts at 5
$s2 gmp_init("101110000"2);
echo 
gmp_scan0($s25) . "\n";
?>

以上例程会输出:

3
7

User Contributed Notes

There are no user contributed notes for this page.

CopyRight © 2008-2022 verySource.Com All Rights reserved. 京ICP备17048824号-1 京公网安备:11010502034788