Environment: VC 4.0/5.0
I made this code while working on a program for analyzing mathematical expressions, and
I made some classes for making things easier.
See sample code: express.zip ; the programme was writen using
MSVC 4.0 and compiled with MSVC 5.0
This classes can be used for evaluating expressions like :
1+var1+var2*(5+b5), where var1 , var2 can be: numeric values or expressions or other
numeric stuff. See the sample code.
The class hierarchy that I implemented is :
CExpression derived from CObject – represents
a mathematical expression; use ChangeExpression to assign a string
expression to the expression object
The folowing mathematical functions are known: sin, cos, exp, sqrt, log, tg, ctg, asin,
acos, atg and the default operations like +, -, *, /, ^ – (pow()); the abs function
is implemented using: |expresion|.
CValue derived from CObject – represents a value; use
SetValue/GetValue – to set / get the value, or UpdateValue
to Update the value
CExpValue derived from CValue – represents a value
that is defined by a expresion
CNumericValue derived from CValue – represents a
simple numeric value
The best way of understanding the way that this classes are functioning is to see the
See sample code: express.zip