Module and class example

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Here is a module and class example for a few programming languages.

The module part should define a class Adder. Use your initials for the prefix of the module name. The module name suffix should be Adder. The constructor should set the integer class sum to zero. The class should contain a method sumAdd which takes one integer and adds that value to the sum. The class should contain a method sumGet which should return the current sum.

The main code should access the module, create an instance of the Adder class and then call that instance to add the integer values from 0 to 8 (inclusive) using the sumAdd method of the Adder class. The main code should then use the sumGet method to get and display the sum using a print statement.

In addition to class notes, see the following in particular.

Here is a code module in Python [module rmsAdder in rmsAdder.py].

# module rmsAdder.py

class Adder():

	def __init__(self):
		self.sum = 0


	def sumAdd(self, x1):
		self.sum += x1


	def sumGet(self):
		return self.sum


print("(module rmsAdder imported)")

Here is the Python code.

import rmsAdder

adder1 = rmsAdder.Adder()
i = 0
while i != 9:
	adder1.sumAdd(i)
	i += 1
sum1 = adder1.sumGet()
print("{0:d}".format(sum1))

Here is the output of the Python code.

(module rmsAdder imported)
36

Here is a code module in Lua [module rmsAdder in rmsAdder.lua].

-- begin class
Adder = {}

function Adder:new(table1)
	table1 = table1 or {}
	setmetatable(table1, self)
	self.__index = self
	Adder.sum = 0
	return table1
	end

function Adder:sumAdd(x1)
	Adder.sum = Adder.sum + x1
	end

function Adder:sumGet()
	return Adder.sum;
	end
-- end class

Here is the Lua code.

require("rmsAdder")

local adder1 = Adder:new()
local i = 0
while i ~= 9 do
	adder1:sumAdd(i)
	i = i + 1
	end
local sum1 = adder1:sumGet()
print(string.format("%d\n",sum1))

Here is the output of the Lua code.

36

Here is a code module in JavaScript [module rmsAdder in rmsAdder.js].

"use strict";

var Adder = function() {
	this.sum = 0;
	this.sumAdd = function(x1) {
		this.sum += x1;
		};
	this.sumGet = function() {
		return this.sum;
		};
	};

module.exports.Adder = Adder;

Here is the JavaScript code.

"use strict";
var rmsAdder = require("./rmsAdder");

var adder1 = new rmsAdder.Adder();

var i = 0;
while (i != 9) {
	adder1.sumAdd(i);
	i++;
	}
var sum1 = adder1.sumGet();
console.log(sum1+"\n");

Here is the output of the JavaScript code.

36

Here is a code module in PHP [module rmsAdder in rmsAdder.php].

<?php namespace rmsAdder;

class Adder {

	public function __construct() {
		$this -> sum = 0;
		}

	public function sumAdd($x1) {
		$this -> sum += $x1;
		}

	public function sumGet() {
		return $this -> sum;
		}
	}
?>

Here is the PHP code.

<?php
require_once("rmsAdder.php");
use rmsAdder as rmsAdder;

$adder1 = new rmsAdder\Adder();

$i = 0;
while ($i !== 9) {
	$adder1 -> sumAdd($i);
	$i++;
	}
$sum1 = $adder1 -> sumGet();
printf("%d\n",$sum1);
?>

Here is the output of the PHP code.

36