php 大数据数学运算库
BCMath Arbitrary Precision Mathematics[*]BC Math Functions
[*]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
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