ricoputrap / basic-calculator-app

Basic Calculator App

Idea from: app-ideas/Calculator

User Story

• User can see a display showing the current number entered or the result of the last operation.
• User can see an entry pad containing buttons for the digits 0-9, operations - '+', '-', '/', and '=', a 'C' button (for clear), and an 'AC' button (for clear all).
• User can click the 'C' button to clear the last input that the user has not submitted it yet
• User can click the 'AC' button to clear all internal work areas and to set the display to 0.
• User can click on an operation button to display the result of that operation on the result of the preceding operation and the last number entered
• User can delete the last number entered
• User can enter numbers as sequences up to 8 digits long by clicking on digits in the entry pad. Entry of any digits more than 8 will be ignored.
• User can see 'ERR' displayed if any operation would exceed the 8 digit maximum.

Bonus Features

• User can click a '+/-' button to change the sign of the number that is currently displayed.
• User can see a decimal point ('.') button on the entry pad to that allows floating point numbers up to 3 places to be entered and operations to be carried out to the maximum number of decimal places entered for any one number.