Gaia/Calculator: Difference between revisions
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==Design Specs== | ==Design Specs== | ||
==== Interaction ==== | ==== Interaction ==== | ||
* [https:// | * [https://www.dropbox.com/sh/ygwfxk6chpshxdj/sroLMzZI7n/Apps/Calculator Dropbox] | ||
==== Visual ==== | ==== Visual ==== | ||
Revision as of 06:07, 4 September 2012
Design Specs
Interaction
Visual
Requirements
General
- I can see the equation I've entered
- I can see the results of the current calculation
Basic Operations & Calculator functions
- I can enter in a number with a maximum of N digits
- I can change the sign of a number
- I can enter in a decimal number
- I can add two numbers together
- I can subtract one number from the other
- I can multiply two numbers together
- I can divide a non-zero number from another number
- I can clear an equation from the screen
- I can clear the last digit of a number I just entered, as long as I haven't pressed an operator key yet
Extended Calculator functions (Might not need or want these features for v1)
- I can perform an operation a second time by pressing the equals sign a second time.
- I can convert the result from a percentage to a decimal value.
- I can store a result in the calculator's memory
- I can retrieve a result from the calculator's memory
- I can clear the value in the calculator's memory
- log/ln/e
- ^
- squareroot and root
- Pi/tau
- cos/sin/tan
Computation Cases
- I'm informed that I can't divide a number by zero (cannot divide by zero)
- I'm informed that I can't divide zero by zero (result is undefined)
- I can view the result in exponential notation if the number is too large or too small to be displayed