算术表达式解析器 .rar 支持变量和以下数学函数ABS, ATAN, COS, EXP, LN, ROUND,SIN, SQRT, SQR, TRUNC, NOT, BOOL, SGN\"-arithmetic expression parser. Rar support of the following variables and Math ABS, ATAN, COS, EXP, LN, ROUND, SIN, SQRT, SQR, TRUNC, NOT, BOOL, SGN "