creating a password in C++

[superStar6]

need help with a password checker I'm making

#include "stdafx.h"
#include <iomanip>
#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;


int main()
{
	// variables
	string password = "";
	string guess = "";
	string attempt = "";

	cout << "Enter a password using any characters from [a-z, A-Z, !, @, #, $, %, &]";
	cout << endl << "Password: ";
	getline(cin, password);

	system("cls");

	while (guess != password)
	{
		cout << "What is the password you entered?: ";
		getline(cin, guess);

		cout << endl;

		cout << "Password: ";
		for (int i = 0; i < password.length(); i++)
		{
			guess.substr(0,i) = password;
			attempt = password;
			cout << attempt;
		}
		cout << endl << "You entered: " << guess << endl;

		if (guess.length() != password.length())
		{
			cout << "Password length does not match!" << endl;
		}

		cout << endl;
	}
	cout << "You guessed the right password!" << endl;
	
    return 0;
}

only trouble I'm having is with the substr function. I am trying to compare each letter of the guess to the original password and have no idea what I'm doing with that for loop

[jonnin]

just index the string.

if(password.length() == guess.length())
for(x = 0; x < password.length(); x++)
{
if(password[x] == guess[x])
something
else
somethingelse
}
else//guess length is wrong, comparison is pointless

if this is a true password function, you can just try
if(password == guess) //does it for you!!

if this is a game where you tell the user they got X out of Y correct, you need the above loop to figure out what they got right and wrong.


substr is sub-string, it is unsuitable for extracting single letters. It can do it, but it returns a string which is unfriendly for the task at hand.