支持实数（包括负数）的四则运算（包括加减乘除，括号等），对所有输入进行语法检测，可以重复计算，稍微扩展一下即可支持乘方，开方等扩展函数；内存占用小，可以支持windows，unix，以及linux各种操作系统等。

Packet : col.rar filelist
col.cpp

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