Не уходи постой, Рогозин

#include <string>
#include <iostream>
#include <stdexcept>
#define N 5
using namespace std;

struct user
{
    int userID;
    string userName;
    int password;
    string testPassword;
};

int main()
{

    int c;
    user userList[N]={};

    for (int i = 0; i<N; ++i)
    {
        cout<<"Enter user ID: ";
        cin>>userList[i].userID;
        cout<<"Enter username: ";
        cin>>userList[i].userName;
        cout<<"Enter user password: ";
        cin>>userList[i].password;
    }
    for (int i = 0; i < N; ++i)
    {
        c = userList[i].password;
        while (c > 9)
        {
            c = c / 10;
        }
        if ((c == 1) && ((userList[i].password % 10) == 0))
        {
            cout<<"Correct userdata: ";
            cout << userList[i].userID <<" ";
            cout << userList[i].userName <<" ";
            cout << userList[i].password <<" \n";
        }
        else
        {
            cout<<"User #"<<i + 1<<" has incorrect password"<<"\n";
        }
    }
    return 0;
}