How to split a string of only ten characters e.g."12345*45688" into an array

Question

I'm making a simple calculator where you type values into an edit box. I need to split the string into a number of arrays depending on how many *+-/ there are in the sum for instance

I have 22+22*22-22/22 I want to break that into five different arrays because there are five different groups of numbers. Then later I am going to add array1 to array two multiply that by array3 and subtract that by array4 and divide that by array 5.

Answer 1

If you want to read something like that, especially if you want to evaluate mathematical expressions, you need more than just an array-splitter; you need a real parser. Doing it right requires a bit of compiler theory. I'd recommend you take a look at Let's Build A Compiler, a tutorial that covers everything you'll need to know about expression parsing (and a bit more, since he's actually building a simple compiler) and makes it easy to understand. All examples are in Turbo Pascal, so it should be easy for a Delphi coder to read.

Answer 2

Delphi XE has a SplitString function that does exactly what you need.