Calculator

[points2008]

I always wondered how Scientific Calculators like Casio Work. Do they follow any specific Algorithm. How do they do it? If anyone knows the answer please post the algorithm

[LB]

How they do what?

[Script Coder]

Well AFAIK they use a technique called CORDIC to work out trigonometric functions and logs. Other than that they would probably use normal computer arithmetic to calculate everything else.

[LB]

We use TI-89 calculators, and they have an expression data type (for exact calculations resulting in expressions or complex numbers) and a normal numeric type used for real/imaginary parts.

[ypfz3TCk]

If you have access to a copy of Stroustrup's The C++ Programming Language 3rd edition (I dont know about the latest editions) he works through the implementation of a calculator using C++. From what i remember it is designed in a similar way to a compiler - there are tokens representing various expressions that are passed to a module that processes the input.

Anyway that book actually shows how to implement a calculator from scratch.

[a k n]

Why don't you look at your calc's manual i looked at mine and found it used newton's method to solve polynomials with powers >3 and some xxxxxx* 's method for integration and yyyyyy** 's technique for zzzzz***.

*I don't remember
**I don't remember
***I don't remember