exercism.org/lua/cars-assemble

cars-assemble

Welcome to cars-assemble on Exercism's Lua Track. If you need help running the tests or submitting your code, check out HELP.md. If you get stuck on the exercise, check out HINTS.md, but try and solve it without using those first :)

Introduction

Numbers

Lua uses two representations for numbers: 64-bit integer numbers and double-precision floating-point numbers. It supports the usual set of arithmetic operators: addition, subtraction, multiplication, division and negation. Additionally it supports floor division, modulo and exponentiation.

Operator	Example
+	1 + 2 --> 3
-	2 - 1 --> 1
*	2 * 2 --> 4
/	4 / 2 --> 2.0
//	11 // 3 --> 3
%	11 % 3 --> 2
^	10 ^ 2 --> 100.0
-	-(2 * 2) --> -4

Instructions

In this exercise you'll be writing code to analyze an assembly line in a car factory.

1. Calculate the number of working cars produced per hour

Implement a function that takes in the number of cars produced per hour and the success rate and calculates the number of successful cars made per hour. The success rate is given as a percentage, from 0 to 100:

cars.calculate_working_cars_per_hour(1547, 90)
--> => 1392.3

Note: the return value should be a float.

2. Calculate the number of working cars produced per minute

Implement a function that takes in the number of cars produced per hour and the success rate and calculates how many cars are successfully produced each minute:

cars.calculate_working_cars_per_minute(1105, 90)
-- => 16

Note: the return value should be an integer.

3. Calculate the cost of production

Each car normally costs $10.000 to produce individually, regardless of whether it is successful or not. But with a bit of planning, 10 cars can be produced together for $95.000. For example, 37 cars can be produced in the following way: 37 = 3 x groups of ten + 7 individual cars

So the cost for 37 cars is: 3 * 95,.000 + 7 * 10.000 = 355.000

Implement a function that calculates the cost of producing a number of cars, regardless of whether they are successful:

cars.calculate_cost(37)
-- => 355000

cars.calculate_cost(21)
-- => 200000

Note: the return value should be an integer.

Source

Created by

• @imolein