readme.txt

是一个VB类,相当于vbscript中的eval函数,是用堆栈实现

CEval - Algebraic expression evaluator class for VB5
Copyright (c) 1995-97 SoftCircuits Programming (R)
Redistributed by Permission.

This class implements an Algebraic expression evaluator for Visual
Basic 5. It support floating point numbers, most standard operators,
plus or minus unary operators and parantheses to override default
precedence rules. Rudimentary support for user-defined symbols is also
included.

To use this class in your own programs, you need to include CEval.cls,
CStack.cls and CSymbolTable.cls in your project. If you don't need
support for user symbols, then set the USE_SYMBOLS #Const to False and
then only include CEval.cls and CStack.cls.

At the time this demo was put together, SoftCircuits was building a
more sophisticated version of this code that is implemented as a
control and uses events to implement user symbols and even user
functions. Although not determined at this time, this example will
most likely not be for free. But if you need something a little more
sophisticated, please stop by our web site and see what else we have
to offer.

This program may be distributed on the condition that it is
distributed in full and unchanged, and that no fee is charged for
such distribution with the exception of reasonable shipping and media
charged. In addition, the code in this program may be incorporated
into your own programs and the resulting programs may be distributed
without payment of royalties.

This example program was provided by:
 SoftCircuits Programming
 http://www.softcircuits.com
 P.O. Box 16262
 Irvine, CA 92623