Portable calculator built using app.nit

Project structure

• calculator_logic defines CalculatorContext with all the business logic of a calculator. It takes as input operations and numbers, and outputs the text to display.
• calculator implements the portable graphical interface using the app.nit framework
• calculator_test test CalculatorContext as a black box.

Usage

1. Compile with a call to make.
2. Run with either:
   1. The desktop version, bin/calculator.
   2. The Android version by install the APK at bin/calculator.apk.