stringcalc

README

Borrowed from: https://github.com/codingdojo-org/codingdojo.org/blob/master/content/kata/StringCalculator.md

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title: "String Calculator" draft: false date: "2017-07-26T12:00:00"

First step

Create a function add they take a string and return a float like :

double add(String number)

• The method can take 0,1 or 2 numbers separated by comma and return their sum,
• an empty string will return 0
• Example of inputs : "", "1", "1.1,2.2"

Many numbers

Allow the add method to handle an unknow number of arguments

New separator

Allow the add method to handle new lines as separator

• "1\n2,3" should return 6.
• "1,\n" is invalid and throw an exception

Many separator

Allow the add method to handle a different delimiter

To change the delimiter, the beginning of the string will contain a separate line that looks like this :

"//[delimiter]\n[numbers]

Example :

"//;\n1;2"   => 3
"//|\n1|2|3" => 6

All existing scenarios should work as before.

Negatives numbers

Calling add with negatives numbers will throw an exception "Negative not allowed : " listing all negative numbers that were in the list of numbers

"-1,2"    => Negative not allowed : -1
"2,-4,"

Others operations

Write a function for multiply with same rules