Jul 122009

sCalc 1.1 has been on the app store for a very long time with the note, “saving history coming soon.” Over the past few weekends I’ve finally implemented history saving.

The quadratic equation

The quadratic equation

  • Swiping on the equations allow you to delete old equations that you no longer need.
  • The variable list has been moved into the “Variables” button the top bar.  You can swipe to clear these as well.
  • The catalog displays all the functions the calculator can perform.  This is not useful at all right now as there is a key for all operations in the catalog.  But it’s a foundation for further work.

I also added a ‘2nd’ button that swaps keys like your expect.  Very few change though, again it is foundational.  The keys that do change are ‘x’ => ‘y’; ln => lg; ‘=’ => ‘Ans’.

Further changes include updates to pretty printing the equations.  Division of two simple elements (numbers or variables) are displayed as 1/2 instead of 1 over 2.  Also, 2•x is now displayed with the implicit multiplication as 2x.

So, most changes where made with the future in mind and to fix the problem with losing the history when the application starts. I’ve been using the saved history for about a week so I feel it is necessary to get that feature out before adding more.

I’ll post more about future features soon.

 Posted by at 12:40 pm

  2 Responses to “sCalc 1.2 submitted for review”

  1. Also, there was an issue with being able to type multiple decimal points in a number, e.i. “5.43.98” That issue is fixed in 1.2

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