This is a solution to the Software Shokunin Community Febuary Code Challenge

Write a program that adds two (or more) integers, without using any of the plus literal (+), the minus literal (-), the add method (or equivalent), the subtraction method (or equivalent), the sum method. The integers can be negative, zero or positive.

How to run it

1. Download a Game Boy Advance emulator such as Boycott Advance
2. Open the file called legendofadda.gba

Instructions:

To add two numbers together, use the keypad to set the numbers and then press enter

• Keypad UP = Increment first number.
• Keypad DOWN = Decrement first number.
• Keypad RIGHT = Increment second number.
• Keypad LEFT = Decrement second number.
• ENTER = Add the numbers together.

For example

To find out the answer to 3 + 1

1. Press Keypad UP three times
2. Press Keypad RIGHT once
3. Press ENTER

To find out the answer to 1,999,999,999 + 999,937

1. Press Keypad UP one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine times
2. Press Keypad RIGHT nine hundred ninety-nine thousand, nine hundred thirty-seven times
3. Press ENTER

Compiling (MAC)

Download devkitARMupdate.pl

$ chmod 755 devkitARMupdate.pl
$ ./devkitARMupdate.pl

Use the Makefile

$ cd legendofadder
$ make clean
$ make