Raindrops

Instructions

Your task is to convert a number into its corresponding raindrop sounds.

If a given number:

• is divisible by 3, add "Pling" to the result.
• is divisible by 5, add "Plang" to the result.
• is divisible by 7, add "Plong" to the result.
• is not divisible by 3, 5, or 7, the result should be the number as a string.

Examples

• 28 is divisible by 7, but not 3 or 5, so the result would be "Plong".
• 30 is divisible by 3 and 5, but not 7, so the result would be "PlingPlang".
• 34 is not divisible by 3, 5, or 7, so the result would be "34".

Implementation

In this exercise you will implement a procedure which is meant to allocate the string it returns. Deallocating the string is the responsibility of the prodecure's caller.

// The procedure will be called like that:
converted := convert(3)
// ...
// and eventually the caller will delete the string
delete(converted)

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Source

A variation on FizzBuzz, a famous technical interview question that is intended to weed out potential candidates. That question is itself derived from Fizz Buzz, a popular children's game for teaching division.