PHP5中文手册·Calculate GCD -- 追寻梦想＞编程乐园＞PHP 编程

resource gmp_gcd ( resource $a , resource $b )

Calculate greatest common divisor of a and b . The result is always positive even if either of, or both, input operands are negative.

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.
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.

A positive GMP number that divides into both a and b .

Example#1 gmp_gcd() example


<?php
$gcd = gmp_gcd("12", "21");
echo gmp_strval($gcd) . "\n";
?>

上例将输出：


	PHP5中文手册 gmp_fact gmp_gcdext GMP PHP Manual gmp_gcd (PHP 4 >= 4.0.4, PHP 5) gmp_gcd — Calculate GCD 说明 resource gmp_gcd ( resource `$a` , resource `$b` ) Calculate greatest common divisor of `a` and `b` . The result is always positive even if either of, or both, input operands are 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. `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. 返回值 A positive GMP number that divides into both `a` and `b` . 范例 Example#1 gmp_gcd() example `<?php $gcd = gmp_gcd("12", "21"); echo gmp_strval($gcd) . "\n"; ?>` 上例将输出： 3 gmp_fact gmp_gcdext GMP PHP Manual