How do you increment a vector for classes? C++

[Broko668]

I've been working on a project to make a ATM bank application but I've ran into a problem. I need to make an unlimited number of vectors of the class Bank I've created.

I can't seem to find out how. I tried push_back but it did not work for me.

I know that there are some variables and loops that aren't used properly. I believe that this is all the code I need to display to get my question resolved.

using namespace std;
 
int main()
{
    bool loop1 = true;
    bool loop2 = true;
    bool loop3 = true;
    bool loop4 = true;
    int i = 0;
    int clientInt;
 
    while (loop1)
    {
        vector<Bank> clients(2);
 
        while (loop2)
        {
            while (loop3)
            {
                clients[i].set_account(clients);
 
                if (clients[i].get_account_setup() == false)
                    break;
 
                while (loop4)
                {
                    clients[i].main_menu(clients, i);
 
                    if (clients[i].get_mm_response() == 4)
                        loop4 = false; i++;
                }
                //cout << i << endl; // for debugging purposes
 
                loop4 = true;
            }
 
            loop2 = false;
        }
 
        cout << endl << endl;
        system("pause");
        return 0;
    }
}
 
 

[weaknessforcats]

This should work:

vector<Bank> clients;
 
Bank b;
 
clients.push_back(b);

What happens when you do this?

Of course, this example presumes necessary constructors are available.

[Broko668]

It worked for me. It did what I asked for, thanks!

But now I need to know why did it work? If that's not too much to ask. I didn't understand what the compiler was trying to tell me. I understood how push_back worked for other basic types of vectors but not for this one.

[weaknessforcats]

I don't know what error you were getting but all C++ library objects, like vector, presume you have a well-behaved class. That is, all necessary constructors, destructors, operator overloads, and methods are in place.

Further, the type in the push_back() must be the same type used to create the vector.