Question

How do i Evaluate the following expression from a string to a answer as an integer?

Expression:

√(7+74) + √(30+6)

Do i have to evaluate each one of the parameters like Sqroot(7+74) and Sqroot(30+6) or is it possible to evaluate the whole expression. Any ideas?

Answer 1

If this string is user-supplied (or anyway available only at runtime) what you need is a mathematical expressions parser (maybe replacing the √ character in the text with sqrt or whatever the parser likes before feeding the string to it). There are many free ones available on the net, personally I used info.lundin.math several times without any problem.

Quick example for your problem:

info.lundin.Math.ExpressionParser parser = new info.lundin.Math.ExpressionParser();
double result = parser.Parse("sqrt(7+74)+sqrt(30+6)", null);

(on the site you can find more complex examples with e.g. parameters that can be specified programmatically)