implementation of the calculus functions i.e f(x), in programming
I want to write a program that calculates a given math function (by the user) with specific set of values.
The user is asked to type a function, say he typed f(x)= (x^2)+3x+1 then through the program I should show the outputs of [ f(3), f(6) and f(9) ] .
The question specifically is how to fetch these x's in the typed function, then how to convert the function from a string to a double or float.
Do you have any thoughts about that ?
suppose that I'm using C , or开发者_如何学C C++
This is not an easy task, especially as operators hold precedence over others.
Have a look at some of these links so see what you're dealing with:
Equation (expression) parser with precedence?
http://en.wikipedia.org/wiki/Operator-precedence_parser
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