CalculatorX

A calculator for mathemathics expressions

What is CalculatorX?

CalculatorX is a calculator that will support decimal number expressions with features such as:

• Basic Operations with parentheses and operator precedence:

  • Addition
  • Subraction
  • Multiplication
  • Division
  • Exponents

• Additional Features:

  • Variables
    • Constant Variables
  • User Defined Functions
  • File evaluation and File output

How to use CalculatorX?

• Input and Output from/to terminal:

  • cmd: "java -jar CalculatorX.jar"

• Input from file and output to terminal or File

  • cmd: "java -jar CalculatorX.jar inputFile outputFile"

• NOTE: If using the executable release ommit the "java -jar" part

How it Works

-Just type your mathematical expression and press enter to get the result. Ex: if you type "2 + 5" you will get 7. CalculatorX supports addition(+), subraction(-), division(/) and multiplication(*), powers(x^y). You can use parentheses to modify the order of evaluation such that if you type "2 * (2 + 1)" the result will be 6

VARIABLES

In addition to the basic operations, CalculatorX also supports variables. You can do all the arithimetic operations with variables Here is an example of how to use variables: "let x = 22". This declares a variable named x that holds the value 22 If I want to modify the variable to hold the value 10 instead of 22, I would simply type "x = 10"

FUNCTIONS

Built in functions sqrt(x) -> square root You can define your own functions in CalculatorX. As an example, here is how to declare a function that computes the double of a number: "let double(x) = x * 2"

Functions can have zero or more than one argument, for exemple the following function takes 2 parameters and computes their average: "let average(x,y) = (x + y) / 2" To call a function simply type the name of the function followed by the arguments values. Using as an example the preceding function: "average(5,7)" -> the result will be 6

To exit just type "exit" and press enter;