Random character selection from string

Here given code implementation process.

// Include header file
#include <iostream>
#include <time.h>
#include <stdlib.h>

using namespace std;
/*
    C++ program
    Random character selection from string
*/
class Selection
{
	public:
		// Returns a random character
		char randomSelection(string text)
		{
			int n = text.length();
			int position = rand() % n;
			return text[position];
		}
	void password(string text, int n)
	{
		string result = "";
		for (int i = 0; i < n; ++i)
		{
			result += this->randomSelection(text);
		}
		// Display given text
		cout << "\n Given size : " << n;
		// Display calculated result
		cout << "\n Result     : " << result;
	}
};
int main()
{
  	srand(time(NULL));
	Selection *task = new Selection();
	string text = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
	// n = 30
	task->password(text, 30);
	// n = 15
	task->password(text, 15);
	// n = 8
	task->password(text, 8);
	return 0;
}

input

 Given size : 30
 Result     : acpXf9p4ceab7sSY1RnP1h@b9%uoTQ
 Given size : 15
 Result     : Wtq7CH3q9VGYuCC
 Given size : 8
 Result     : 7Z2N9GDd
import java.util.Random;
/*
    Java program
    Random character selection from string
*/
public class Selection
{
	// Returns a random character
	public char randomSelection(String text)
	{
		int n = text.length();
		int position = (int)(Math.random() *(n));
		return text.charAt(position);
	}
	public void password(String text, int n)
	{
		String result = "";
		for (int i = 0; i < n; ++i)
		{
			result += randomSelection(text);
		}
		// Display given text
		System.out.print("\n Given size : " + n);
		// Display calculated result
		System.out.print("\n Result     : " + result);
	}
	public static void main(String[] args)
	{
		Selection task = new Selection();
		String text = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
		// n = 30
		task.password(text, 30);
		// n = 15
		task.password(text, 15);
		// n = 8
		task.password(text, 8);
	}
}

input

 Given size : 30
 Result     : BtdKDY9cmVivxFkhZH@H%1F9THW%MD
 Given size : 15
 Result     : WugLbSrX1kDH8YH
 Given size : 8
 Result     : aXkac$zU
// Include namespace system
using System;
/*
    Csharp program
    Random character selection from string
*/
public class Selection
{
	// Returns a random character
	public char randomSelection(String text)
	{
		int n = text.Length;
      	Random rand = new Random();
		int position = rand.Next(0, n);;
		return text[position];
	}
	public void password(String text, int n)
	{
		String result = "";
		for (int i = 0; i < n; ++i)
		{
			result += this.randomSelection(text);
		}
		// Display given text
		Console.Write("\n Given size : " + n);
		// Display calculated result
		Console.Write("\n Result     : " + result);
	}
	public static void Main(String[] args)
	{
		Selection task = new Selection();
		String text = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
		// n = 30
		task.password(text, 30);
		// n = 15
		task.password(text, 15);
		// n = 8
		task.password(text, 8);
	}
}

input

 Given size : 30
 Result     : qzaw8PzBA9p%y$uDPJWVrC%otAJRtp
 Given size : 15
 Result     : sc6L5o$gVgsO2X7
 Given size : 8
 Result     : kjuFun2$
package main
import (
    "fmt"
    "math/rand"
)
/*
    Go program
    Random character selection from string
*/

// Returns a random character
func  randomSelection(text string) byte {
	var n int = len(text) - 1
	var position int = rand.Intn(n);
	return text[position]
}
func password(text string, n int) {
	var result string = ""
	for i := 0 ; i < n ; i++ {
		result += string(randomSelection(text))
	}
	// Display given text
	fmt.Print("\n Given size : ", n)
	// Display calculated result
	fmt.Print("\n Result     : ", result)
}
func main() {

	var text string = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890"
	// n = 30
	password(text, 30)
	// n = 15
	password(text, 15)
	// n = 8
	password(text, 8)
}

input

 Given size : 30
 Result     : kvlOz3oAVP91@JwJutHptphN7H7X%F
 Given size : 15
 Result     : QN2pYfWfopXoESS
 Given size : 8
 Result     : RSJxclQn
<?php
/*
    Php program
    Random character selection from string
*/
class Selection
{
	// Returns a random character
	public	function randomSelection($text)
	{
		$n = strlen($text);
		$position = rand(0, $n-1);
		return $text[$position];
	}
	public	function password($text, $n)
	{
		$result = "";
		for ($i = 0; $i < $n; ++$i)
		{
			$result .= $this->randomSelection($text);
		}
		// Display given text
		echo("\n Given size : ".$n);
		// Display calculated result
		echo("\n Result     : ".$result);
	}
}

function main()
{
	$task = new Selection();
	$text = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
	// n = 30
	$task->password($text, 30);
	// n = 15
	$task->password($text, 15);
	// n = 8
	$task->password($text, 8);
}
main();

input

 Given size : 30
 Result     : #@%a5gS#wsqdQS%XoL%LXi$NW3qX$j
 Given size : 15
 Result     : jpVZCQ3UDp0uEQ9
 Given size : 8
 Result     : 5nnGdzd8
/*
    Node JS program
    Random character selection from string
*/
class Selection
{
	// Returns a random character
	randomSelection(text)
	{
		var n = text.length;
		var position = Math.floor(Math.random() * n );
		return text.charAt(position);
	}
	password(text, n)
	{
		var result = "";
		for (var i = 0; i < n; ++i)
		{
			result += this.randomSelection(text);
		}
		// Display given text
		process.stdout.write("\n Given size : " + n);
		// Display calculated result
		process.stdout.write("\n Result     : " + result);
	}
}

function main()
{
	var task = new Selection();
	var text = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
	// n = 30
	task.password(text, 30);
	// n = 15
	task.password(text, 15);
	// n = 8
	task.password(text, 8);
}
main();

input

 Given size : 30
 Result     : p1k2F90IDUmCt#7uvbifAta9jbw5Rn
 Given size : 15
 Result     : kUDlsEMyayko#wm
 Given size : 8
 Result     : 7A7$9DhO
import random
import sys
#    Python 3 program
#    Random character selection from string
class Selection :
	#  Returns a random character
	def randomSelection(self, text) :
		n = len(text)
		position = random.randint(0,n-1)
		return text[position]
	
	def password(self, text, n) :
		result = ""
		i = 0
		while (i < n) :
			result += self.randomSelection(text)
			i += 1
		
		#  Display given text
		print("\n Given size : ", n, end = "")
		#  Display calculated result
		print("\n Result     : ", result, end = "")
	

def main() :
	task = Selection()
	text = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890"
	#  n = 30
	task.password(text, 30)
	#  n = 15
	task.password(text, 15)
	#  n = 8
	task.password(text, 8)

if __name__ == "__main__": main()

input

 Given size :  30
 Result     :  %1jc6x$tCLq6C3J9ybmRwGUGY7Uc4a
 Given size :  15
 Result     :  Vtn%Q5GvWEY3qv9
 Given size :  8
 Result     :  NtFpWH$u
#    Ruby program
#    Random character selection from string
class Selection 
	#  Returns a random character
	def randomSelection(text) 
		n = text.length 
		r = Random.new
		position = r.rand(0...n)
		return text[position]
	end

	def password(text, n) 
		result = ""
		i = 0
		while (i < n) 
			result += self.randomSelection(text)
			i += 1
		end

		#  Display given text
		print("\n Given size : ", n)
		#  Display calculated result
		print("\n Result     : ", result)
	end

end

def main() 
	task = Selection.new()
	text = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890"
	#  n = 30
	task.password(text, 30)
	#  n = 15
	task.password(text, 15)
	#  n = 8
	task.password(text, 8)
end

main()

input

 Given size : 30
 Result     : 3s@STEZ#LusqL8ipF6HGFMvcSaOLhM
 Given size : 15
 Result     : H$o9JKuDYyMvcx8
 Given size : 8
 Result     : 1XzFF9Z2
import scala.collection.mutable._;
/*
    Scala program
    Random character selection from string
*/
class Selection()
{
	// Returns a random character
	def randomSelection(text: String): Char = {
		var n: Int = text.length();
  		val r = new scala.util.Random
		var position: Int = r.nextInt(n-1) ;
		return text.charAt(position);
	}
	def password(text: String, n: Int): Unit = {
		var result: String = "";
		var i: Int = 0;
		while (i < n)
		{
			result += randomSelection(text);
			i += 1;
		}
		// Display given text
		print("\n Given size : " + n);
		// Display calculated result
		print("\n Result     : " + result);
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var task: Selection = new Selection();
		var text: String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
		// n = 30
		task.password(text, 30);
		// n = 15
		task.password(text, 15);
		// n = 8
		task.password(text, 8);
	}
}

input

 Given size : 30
 Result     : %$2t%RAwtRWC@U7XGYOGB8ThnTDtd%
 Given size : 15
 Result     : I#sgkDcddoJKoy$
 Given size : 8
 Result     : zLGYi8tV
import Foundation

#if os(Linux)
    srandom(UInt32(time(nil)))
#endif
/*
    Swift 4 program
    Random character selection from string
*/
class Selection
{
	// Returns a random character
	func randomSelection(_ text: [Character]) -> Character
	{	
		let n: Int = text.count;
      	var position: Int = 0;
        #if os(Linux)
        position = Int(random()%(n)) 
        #else
        position = Int(arc4random_uniform(n)) 
        #endif
		return text[position];
	}
	func password(_ text: String, _ n: Int)
	{
		var result: String = "";
      	let data = Array(text);
		var i: Int = 0;
		while (i < n)
		{
			result += String(self.randomSelection(data));
			i += 1;
		}
		// Display given text
		print("\n Given size : ", n, terminator: "");
		// Display calculated result
		print("\n Result     : ", result, terminator: "");
	}
}
func main()
{
	let task: Selection = Selection();
	let text: String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
	// n = 30
	task.password(text, 30);
	// n = 15
	task.password(text, 15);
	// n = 8
	task.password(text, 8);
}
main();

input

 Given size :  30
 Result     :  oj8s@5FT7lBKwIzpMXwfrbUo2SDPoM
 Given size :  15
 Result     :  @Ntv2dp6wkevuM1
 Given size :  8
 Result     :  d@Cyifb7
/*
    Kotlin program
    Random character selection from string
*/
class Selection
{
	// Returns a random character
	fun randomSelection(text: String): Char
	{
		val n: Int = text.length;
		val position: Int = kotlin.random.Random.nextInt(0, n);
		return text.get(position);
	}
	fun password(text: String, n: Int): Unit
	{
		var result: String = "";
		var i: Int = 0;
		while (i < n)
		{
			result += this.randomSelection(text);
			i += 1;
		}
		// Display given text
		print("\n Given size : " + n);
		// Display calculated result
		print("\n Result     : " + result);
	}
}
fun main(args: Array < String > ): Unit
{
	val task: Selection = Selection();
	val text: String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#$%1234567890";
	// n = 30
	task.password(text, 30);
	// n = 15
	task.password(text, 15);
	// n = 8
	task.password(text, 8);
}

input

 Given size : 30
 Result     : gIbOzJjCTd5BREqQ8lpqI5GHTbP7zh
 Given size : 15
 Result     : HbMwXJOA0lBBcWx
 Given size : 8
 Result     : no3c7zg7


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