Simple command line calculator. Supports the following operations: add, sub, mult, div, and let. The operations can be nested as can be seen in the examples below. The let operation allows a value to be assigned to a variable and the variable can then be used in the calculation. All operations can be nested. Some examples below show some use cases.
| Examples | Answer |
|---|---|
| add(2, 5) | 7.0 |
| sub(1, 9) | -8.0 |
| mult(3, 14) | 42.0 |
| div(47, 2) | 23.5 |
| add(2, mult(3, 4)) | 14.0 |
| let(a, 5, add(a, a)) | 10.0 |
| let(a, 5, let(b, mult(a, 10), add(b, a))) | 55 |
| let(a, let(b, 10, add(b, b)), let(b, 20, add(a, b))) | 40 |
| let(a, 5, let(b, mult(a, let(c, 4, add(c,a))), add(c, b))) | 49 |
- Maven
- Java
- Internet connection (downloading dependencies)
Step-by-step instructions on how to build the code from source
- Clone the repository:
git clone https://github.com/cwagnello/calculator
- Run maven
mvn clean package
Given an executable jar file. The Calculator can be run as follows:
java -DLOG_LEVEL=INFO -Dlogback.configurationFile=<path/to/config/file>/logback.xml -jar Calculator-0.2.0.jar
The logging is done via logback. The log level can be set by passing in the system property LOG_LEVEL. Also the configuration file for logback needs to be specified as one is not built into the application. A sample config is included in the project at logback.xml
https://app.circleci.com/pipelines/github/cwagnello/calculator
#TODOs
- Add more error checking on inputs
- Add CircleCI config to store jar artifact
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