PHP ʖ²ἯTH º󍋼/A IV. BCMath Arbitrary Precision Mathematics Functions ½鉜 For arbitrary precision mathematics PHP offers the Binary Calculator which supports numbers of any size and precision, represented as strings. Шdz Since PHP 4.0.4, libbcmath is bundled with PHP. You don't need any external libraries for this extension. °²װ In PHP 4, these functions are only available if PHP was configured with --enable-bcmath. In PHP 3, these functions are only available if PHP was NOT configured with --disable-bcmath. PHP µĠWindows °汾ґ¾­Ěփ¸À©չģ¿鵄֧³֡£ĺΞШ¼Ӕ؈κθ½¼ӵĀ©չ¿⼴¿Ɋ¹ӃբЩº¯ʽ¡£ ԋАʱŤփ բЩº¯ʽµĐЎªʜµ½ȫ¾ּA HREF="configuration.html#configuration.file" Ťփ΄¼þ php.ini µē°Ϭ¡£ Name Default Changeable bcmath.scale 0 PHP_INI_ALL Number of decimal digits for all bcmath functions. ׊Դ Ѝ ¸À©չģ¿鎴¶¨ҥȎºΗʔ´ Ѝ¡£ Ԥ¶¨ҥ³£ Ŀ¼ bcadd -- Add two arbitrary precision numbers bccomp -- Compare two arbitrary precision numbers bcdiv -- Divide two arbitrary precision numbers bcmod -- Get modulus of an arbitrary precision number bcmul -- Multiply two arbitrary precision number bcpow -- Raise an arbitrary precision number to another bcpowmod -- Raise an arbitrary precision number to another, reduced by a specified modulus. bcscale -- Set default scale parameter for all bc math functions bcsqrt -- Get the square root of an arbitrary precision number bcsub -- Subtract one arbitrary precision number from another º󍋼/A ưµ㼯A aspell_suggest ɏһ¼¶ bcadd