Gaia/Calculator: Difference between revisions

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This is a placeholder page for the Calculator App.
==Design Specs==


For now, this etherpad is a first pass at discussing potential requirements:
==== Interaction ====
[https://etherpad.mozilla.org/umgtFfiGuR Calculator App Requirements]
* [https://www.dropbox.com/sh/ygwfxk6chpshxdj/sroLMzZI7n/Apps/Calculator Dropbox]


==== Visual ====
* [https://www.dropbox.com/sh/i175if5l8lth8x0/Y3ay1TB-Wc Dropbox]
* [https://mozilla.app.box.com/s/wzgsb3lkqglv0dnfdgzs/1/864502372 Box]


Calculator App Requirements
== Requirements ==
General


    I can see the equation I've entered
==== General ====


    I can see the results of the current calculation
* I can see the equation I've entered
* I can see the results of the current calculation


Basic Operations & Calculator functions
==== 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


    I can enter in a number with a maximum of N digits
==== Extended Calculator functions (Might not need or want these features for v1) ====


    I can change the sign of a number
* 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


    I can enter in a decimal number
==== Computation Cases ====


    I can add two numbers together
* 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 subtract one number from the other
* I can view the result in exponential notation if the number is too large or too small to be displayed
 
    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

Latest revision as of 00:08, 12 March 2014

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
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