This repository is an example of writing a small C# compiler for string-based arithmetic operations in less than 30 lines of code. Function uses System.Regex to parse input string expression and match (int[] numbers, string[] tokens) to a Dictionary<int, Func<int, int, int>> operations in computing a mathematical result.
In the following example, the expression "125 + 8 / 3 ^ 2 - 5 / 2" computes sequentially, a limitation of the program.
EXPRESSION="125 + 8 / 3 ^ 2 - 5 / 2"
dotnet run $EXPRESSION
[char]::+::3
[char]::/::5
[char]::^::7
[char]::-::9
[char]::/::5
[expr]::125 + 8
[expr]::133 / 3
[expr]::44 ^ 2
[expr]::1936 - 5
[expr]::1931 / 2
[calc]::965
String literals can be parsed for int.operation using libraries like System.DataTable but the goal of this project is to replicate calculation purely in C# without additional dependencies except for regex parser.
Project available under GPLv3 license, refer to LICENSE.