ExpressionEvaluator

An expression evaluator project using Shunting Yard Algorithm

You can find a description of the project here

How to use

Clone the repository with:

git clone https://github.com/unnikked/ExpressionEvaluator.git

Compile:

javac src/ga/unnikked/expressionevaluator/*.java src/ga/unnikked/expressionevaluator/*/*.java

And execute it with (remember to cd src):

java ga/unnikked/expressionevaluator/Main

You can also pipe in a file using -f directive

cat yourfile | java ga/unnikked/expressionevaluator/Main -f

Here an execution example:

$ cat test | java ga.unnikked.expressionevaluator.Main -f
4*atan(1)
4 1 atan * 
3.141592653589793

##Notes

For testing purpose I've added 6 builtin function: sin, cos, atan, ln, exp, ack.

For example if you want to compute the pi number you could write as input:

4*atan(1)

Or if you want to compute the Ackermann function of 4 and 3 (don't do that :P):

ack(4,3)

If you want to combine more than two builin function I recommend to parentheses them:

(sin(0.71))^2+(cos(0.71))^2

##License

Check LICENSE