calculator -

Portable calculator built using app.nit

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
scientific_calculator refines calculator to add scientific operations.
android_calculator refines calculator to get a nicer aesthetic on Android.
ios_calculator refines calculator to get a nicer aesthetic on iOS.
calculator_test test CalculatorContext as a black box.

Compile and run on the desktop (GNU/Linux and OS X) with:
```
bin/calculator
```
Compile for Android and install on a device or emulator with:
```
make bin/android.apk
adb install -r bin/calculator.apk
```

Compile for iOS and run on the simulator with:

make bin/android.app
ios-sim launch bin/calculator.app

Scientific calculator on Linux with GTK+

Scientific calculator on Android

Scientific calculator on iOS

calculator: Portable calculator built using app.nit (examples/calculator)
- android (examples/calculator/android)
  - res (examples/calculator/android/res)
- src (examples/calculator/src)
  - android14: Aesthetic variation for Android for API 14+ (examples/calculator/src/android14.nit)
  - android21 (examples/calculator/src/android21)
    - android (examples/calculator/src/android21/android)
      - res (examples/calculator/src/android21/android/res)
    - android21: Aesthetic variation for Android Lollypop (API 21) (examples/calculator/src/android21/android21.nit)
  - calculator: Portable calculator UI (examples/calculator/src/calculator.nit)
  - calculator_logic: Business logic of a calculator (examples/calculator/src/calculator_logic.nit)
  - calculator_test: Test the business logic (examples/calculator/src/calculator_test.nit)
  - ios: Aesthetic variation for iOS (examples/calculator/src/ios.nit)
  - scientific (examples/calculator/src/scientific)
    - scientific: Extends the portable calculator app with scientific operations (examples/calculator/src/scientific/scientific.nit)