a simple password generator

PasswordGenerator.cpp

#include "stdafx.h"
#include <string>
#include <cstdlib>
#include <ctime>
#include <iostream>

using namespace std;


string passwordGenerator();

int main()
{
	cout << passwordGenerator() << endl;					// used for testing purposes to display the array.
    return 0;
}

string passwordGenerator() {
	char upperCase[] = { "ABCDEFGHIJKLMNOPQRSTUVWXYZ" };    // Declaring character arrays to pull random characters from.
	char lowerCase[] = "abcdefghijklmnopqrstuvwxyz";
	char numbers[] = "0123456789";
	const int numOfCharacters = 8;							// the length of the password.
	char password[numOfCharacters +1];						// where the random characters will be stored.


	srand(time(0));											// Srand(time(0)) is used to reset the root used in the rand function

	for (int x = 0; x < numOfCharacters; x++) {

		int arrChoice = rand() % 3;							// used to randomly choose what type of character goes next.
		int randIndex;

		switch (arrChoice) {								// Switch statement used to decide which array to choose from and which index to assign to the pass word generator; 
		case 0:
			randIndex = rand() % 9;
			password[x] = numbers[randIndex];
			break;
		case 1:
			randIndex = rand() % 25;
			password[x] = lowerCase[randIndex];
			break;
		case 2:
			randIndex = rand() % 25;
			password[x] = upperCase[randIndex];
			break;
		default:
			password[x] = randIndex = rand() % 25;
			password[x] = upperCase[randIndex];
			break;
		}
	}
	password[numOfCharacters] = '\0';						// adds a NULL character to the end of the array.
	string newPassword(password);							// converts the array into a string. 
	return newPassword;										// returns the String to be printed to the console
}