Accessible Calculator
By Nathan Tech
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Contents:
1. About the program and about this file.
2. Display functions.
3. Memory.
4. Special functions.
5. Navigating the sum and the history.
6. Contact and feedback.
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1. About the program and about this file.
This is, as you may expect from the title, an accessible calculator.
This calculator has been designed specifically with the blind in mind, fully integrating with a screen reader to give access on a level previously unachievable without either forking out a lot of money or paying for equipment that was loud and bulky.
This file is split into sections to hopefully make navigation easier. This section details basic usage while the other sections details the various functions of the program.
First, the basics.
To enter a sum, use your number row to type numbers.
To delete the last thing you typed (or the thing before the cursor, see the section on navigation), hit backspace.
To use the minus sign, press dash.
To use multiply, hold shift and press 8.
To use plus, hold shift and press equals.
To use divide, press slash.
To get the result of your sum, press equals.
To use left and right bracket, hold shift and press 9 and 0 respectively.
To copy the current sum to the clipboard, press control c.
To clear the sum, press control shift c.
To exit the program, press escape.
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2. Display functions.
There are a number of keystrokes you can use to change how the program displays certain things:
alt 1 to alt 0. Round from 0 to 9 decimal places, for instance: Alt 1 would round to 1 decimal place.
Control d: change to display results in decimal format.
Control f: Change results to be shown in improper fractions.
Control g: Change results to display in mixed number fractions.
Control H: change results to show in decimal format but with power notation.
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3. Memory functions:
There are ten memory slots available for you to store numbers in:
Control shift 1 to 0: Have what is in a specific memory slot spoken.
control 1 to 0: Paste in a memory slot.
Alt shift 1 to 0: save the last given answer into a memory slot.
Control Shift V: Paste the last answer into your current sum.
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4. Special functions:
Below is a table of specialist functions the program supports and the keystrokes you can use to enter them:
Power: E. For instance: To write 10 squared you would write 10 e 2.
Square root: R.
Cube root: Y.
PI: P.
Over: F. Used in writing fractions for instance: 5 over 3 would be 5 f 3.
Tangent: T.
Cosine: C.
Sine: S.
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5. Navigation:
To navigate the cursor backwards and forwards in your sum, use control left arrow and control right arrow.
To navigate through the history of sums, use control shift left, right, up and down arrows.
To save your history of sums, press control S.
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6. Contact and feedback.
To provide feedback or if you have questions, please get in touch through the contact page:
https://nathantech.net/contact.php
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End of Readme.
Last Updated: April 4th, 2021.
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Nathan Tech.
It's Not Disability.
It's Ability!