string (Fb login)

#include<iostream>

using namespace std;

int main()
{
    string actual_username = "iub", actual_password = "123";
    string given_username, given_password;

    for(int i=0; i<5; i++)
    {
        cout<<"enter username and password\n";
        cin>>given_username>>given_password;
        if(actual_username==given_username)
        {
            if(actual_password==given_password)
            {
                cout<<"login successful\n";
                break;
            }
            else
            {
                cout<<"login failed\n";
            }
        }
        else
        {
            cout<<"login failed\n";
        }
    }
}