(adsbygoogle = window.adsbygoogle || []).push({}); Took 45 minutes to create, the good thing about this, is it can be integrated with C++ games to create a way of a log in system.

    #include <iostream>

#include <string>

#include <map>

#include "drawMenu.h"



class CLogin

{

    public:

        short index;

        map <short,string> username;

        map <string,string> password;

        string logInStatus;

        void addUser();

        void delUser(short id);

        void display(short id);

        void displayAll();

        void changeUser(short id);

        void logOut();

        void handel(short id,bool& quit);

}storage;

void CLogin::addUser()

{    

    string tempUser,tempPass;

    bool doContinue=0;

    

    for(;

    {

        system("CLS");

        cout<<"\n\tEnter a username: ";

        getline(cin,tempUser);

        

        if(tempUser=="")

            {

                system("CLS");

                cout<<"\n\tNo username entered!";

                Sleep(2000);

                continue;                

            }

        

        doContinue=0;

        

        for(int i=index;i>0;i--)

            if(username[i]==tempUser)

                {

                    system("CLS");

                    cout<<"\n\tUser already exists!";

                    Sleep(2000);

                    doContinue=1;

                }

        if(doContinue)

            continue;

            

        for(;

        {

            system("CLS");

            cout<<"\n\tEnter a password: ";

            getline(cin,tempPass);

            

            if(tempPass=="")

            {

                system("CLS");

                cout<<"\n\tNo password entered!";

                Sleep(2000);

                continue;                

            }

            

            break;

        }

        break;

    }

    index++;

    username[index] = tempUser;

    password[tempUser] = tempPass;

}

void CLogin::delUser(short id)

{

    if(username[id]==logInStatus)

        logInStatus = "Not Logged In";

    for(int i=id;i<=index;i++)

    {

        username[i]=username[i+1];

        password[username[i]]=password[username[i+1]];

        

        username.erase (i+1);

        password.erase (username[i+1]);        

    } 

    index--;

}

void CLogin::display(short id)

{

    system("CLS");

    cout<<"\n\tAccount id:   "<<id;;

    cout<<"\n\tAccount name: "<<username[id];

    cout<<"\n\tAccount pass: "<<password[username[id]];

    cout<<"\n\n\t";

    system("PAUSE");

}

void CLogin::handel(short id,bool& quit)

{

    if(id>index)

    {

        quit = 1;

        return;

    }

    

    string message="Edit user: ";

    message+=username[id];

    bool boolReturn = 0;

    

    for(;

    {

        system("CLS");

        cout<<endl;

        

        switch(drawMenu(message,"Display details|Delete|Log on|Return",1))

        {

            case 1: display(id); break;

            case 2: delUser(id); boolReturn=1; break;

            case 3: changeUser(id); break;

            case 4: boolReturn=1; break;

        }

        if(boolReturn)

            return;

    }

}

void CLogin::displayAll()

{

    string users;

    bool secondLayerQuit = 0;

    

    for(;

    {

        system("CLS");

        users = "";

        if(index>0)

        {

            users+=username[1];

            for(int i=2;i<index;i++)

            {

                users+="|";

                users+=username[i];

            }

            if(index>=2)

            {

                users+="|";

                users+=username[index];

            }

            users+="|";

            users+="Return";

        }

        else

        {

            cout<<"\n\tNo users in the database!";

            cout<<"\n\t";

            system("PAUSE");

            return;

        }

        cout<<endl;

        handel(drawMenu("Users in the database",users,1),secondLayerQuit);

        if(secondLayerQuit)

            return;

    }

}

void CLogin::changeUser(short id){

    logInStatus=username[id];}

void CLogin::logOut(){

    logInStatus="Not logged in";}

int main()

{

    storage.logInStatus = "Not logged in";

    string message;

    for(;

    {

        system("CLS");

        message = "";

        message+="Log in system made by TheUberFail, Log in status: ";

        message+=storage.logInStatus; 

        cout<<"\n";

        switch(drawMenu(    message,

                            "Display Users|Create user|Log out|Exit",

                            1)

                        )

        {

            case 1: storage.displayAll();               break;

            case 2: storage.addUser();                  break;

            case 3: storage.logOut();                   break;

            case 4: return 0;

        }

    }

}

Any feedback of improvements, new features are welcome!

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Ehh... All you do is pass the string by reference to a function that converts the string using arithmatic shit. Use bit wise operation if your going to do an encryption. That's more easily deciphered than mine.
I strongly recommend XOR encryption, simplistic, yet extremely difficult to decrypt as it is key based. Key isn't a fixed length either, so yeah, lol. Trust me, use it