Sorting an Array on the Commodore 64

In this episode I’ll demonstrate how to sort a numeric array on the Commodore 64. The same principle works for string arrays, and of course on all other Commodore BASIC computers.

The technique I’m using here is called Bubble Sort: in effect we’re comparing the first two items in the array, and if the left one is larger than the right one, the values are swapped around. This loop continues until all items in the array have been compared and sorted (hence the smallest items “bubble” to the front of the array, much like the smallest bubbles in a soda float to the top first).

Here’s the full code I’m building, including the lottery portion. The Bubble Sort code starts in line 200.

I’ve explained how to build the lottery generator in this code here: https://wpguru.co.uk/2018/03/how-to-generate-lottery-numbers-on-the-commodore-64/

Happy retro hacking!

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Catch this episode on my Commodore Podcast:

About Jay Versluis

Jay is a medical miracle known as a Super Survivor. He runs two YouTube channels, five websites and several podcast feeds. To see what else he's up to, and to support him on his mission to make the world a better place, check out his Patreon Campaign.

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