Calculator

• The application is a simple calculator that supports the following operations: Addition (+), Subtraction (-), Multiplication (*) and Division (/)
• Calculator supports multi operand expressions and follows bodmas rule for operator precedence. In this case, division and multiplication has precedence over addition and subtraction.
• The application reads input from a single line and prints the result back to console.
• Decimal numbers are supported
• Divisions are rounded with a scale of 2 decimals. Rounding method is ROUND_HALF_EVEN as it minimizes the cumulative error.
  • ROUND_HALF_EVEN means: Round towards the "nearest neighbor" unless both neighbors are equidistant, in which case, round towards the even neighbor
• In case of invalid expressions, the application will warn the user and wait for a new input

Usage

Build (Skip to Run With Docker if JDK 11 not exists)

• It's a Java project that requires Jdk 11 or higher

• Run the following script in root directory in order to build with Maven:

  mvn clean install

• Run the following if Maven is not installed

  ./mvnw clean install

  or in Windows

  ./mvnw.cmd clean install

Run

• Once the build is completed, you can run with one of the following commands:

  java -jar target/calculator-1.0.jar

RUN WITH DOCKER

docker run -it alidemirsoy/calculator