Based on sign digit negabinary representation, the two step addition and one step subtraction of arbitrary length operands can be performed.
基于符号数字负二进制表达，提出了任意字长操作数的并行两步加法与一步减法。
It also has constructors for each of those types and operators for addition, subtraction, multiplication, sign inversion, and taxes.
它包含了对这些类型和加，减，乘，每个经营者签订施工反演，税收。
Simple arithmetic expressions, including addition, subtraction, etc. , to enter an equal sign marks the end of the STL.
说明：用STL实现简单运算表达式，其中包括加减乘除等，以输入等号为结束标志。
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