Kata-RPN.md

Kata RPN

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First iteration: +

• 1 = 1
• 1 2 + = 3
• 1 2 + 3 + = 6
• 1 2 3 + + = 6
• 1 2 3 + + 4 5 + + 6 + = 21
• 1.5 2 + = 3.5
• -1 2 + = 1

Second iteration: -, *, /

• 1 2 - = -1
• 3 1 - = 2
• 2 3 * = 6
• 3 2 / = 1.5
• 1 2 3 + / 4 5 - + 6 * = -4.8

Third iteration: Custom operations

Refactoring phase

• You should be able to add custom operations to your calculator without modifying nor adding any code to your core module.

Fourth iteration: SQRT, MIN, MAX, AVG

• 9 SQRT = 3
• 3 9 SQRT * = 9
• 5 3 7 MIN = 3
• 5 3 7 9 MIN 2 + = 5
• 5 7 MAX = 7
• 5 3 7 1 2 MAX 2 + = 9
• 5 3 7 AVG = 5
• 5 3 7 AVG 2 + = 7

Fifth iteration: Custom notations

Refactoring phase

• Your calculator should be able to parse custom notations without modifying nor adding any code to your core module.
• For example, you could try to implement the infix notation.