I want to get ride off lists and vectors in this program i also dont want to use classes

[david watson]

I want to get ride off lists and vectors in this program i also dont want to use classes,just want to use strings functions and structures so please elp me about this.
thanks

  #include <iostream>
#include <string>
#include <list>
using namespace std;
struct contact
{
	string name;
	int studentiD;
	string address1;
	string address2;
	int phonenumber;
};
std::list<contact> contacts;

int main()
{

	string  Username, Password;
	const string username = "khan";
	const string password = "112233";
	cout << "Enter the Login Details to access the database " << endl;
	cout << "Enter the Username details\n";
	cin >> Username;
	cout << "Enter the password details\n" << endl;
	cin >> Password;

	if (Password != password || Username != username)
	{
		cout << "Invailid Login Details" << endl;
		return 0;
	}

	while (1)
	{
		int choice;
		cout << "Welcome Khan" << endl;
		cout << "Enter 1 to insert a new contact." << endl;
		cout << "Enter 2 to retreive an existing contact." << endl;
		cout << "Enter 3 to remove an existing contact." << endl;
		cout << "Enter 4 to display your contact list." << endl << endl;
		cout << "Enter 5 to quit" << endl << endl;
		cout << "\nYour choice here:";
		cin >> choice;
		if (!cin.good())
		{
			cout << "Input error!";
			return 1;
		}
		switch (choice)
		{
		case 1:
		{
				  char y;
				  contact s;
				  cout << "Enter the Person Name" << endl;
				  cin >> s.name;
				  cout << "Enter the person ID" << endl;
				  cin >> s.studentiD;
				  cout << "Enter the person address Line 1" << endl;
				  cin >> s.address1;
				  cout << "Enter the person address line 2" << endl;
				  cin >> s.address2;
				  cout << "Enter the person Phone number" << endl;
				  cin >> s.phonenumber;
				  contacts.push_back(s);
				  system("cls");

		}
			break;

		case 2:
		{
				  if (contacts.size() <= 0)
					  cout << "=====No Contacts yet=====" << endl;
				  else
				  {
					  cout << "Enter the Contact index (between 0 and " << contacts.size() - 1 << ")" << endl;
					  int index;
					  cin >> index;

					  if (index >= 0 && index< contacts.size())
					  {
						  std::list<contact>::iterator it = contacts.begin();
						  for (int i = 0; i< index; i++) it++;
						  contact s = (*it);
						  cout << s.name << endl;
						  cout << s.phonenumber << endl;
						  cout << s.studentiD << endl;
						  cout << s.address1 << endl;
						  cout << s.address2 << endl;
					  }
				  }
		}
			break;

		case 3:
		{
				  if (contacts.size() <= 0)
					  cout << "=======No Contacts yet=====" << endl;
				  else
				  {
					  cout << "Enter the Contact index (between 0 and " << contacts.size() - 1 << ")" << endl;
					  int idx;
					  cin >> idx;

					  if (idx >= 0 && idx< contacts.size())
					  {
						  std::list<contact>::iterator it = contacts.begin();
						  for (int i = 0; i< idx; i++) it++;
						  contacts.erase(it);
					  }
				  }
		}
			break;

		case 4:
		{
				  if (contacts.size() <= 0)
					  cout << "====No Contacts yet=====" << endl;
				  else
				  {
					  int i = 0;
					  for (std::list<contact>::const_iterator it = contacts.begin(), end = contacts.end(); it != end; ++it)
					  {
						  contact s = (*it);
						  cout << "Contact " << i++ << endl;
						  cout << "\t" << s.name << endl;
						  cout << "\t" << s.phonenumber << endl;
						  cout << "\t" << s.studentiD << endl;
						  cout << "\t" << s.address1 << endl;
						  cout << "\t" << s.address2 << endl;
					  }
				  }
		}
			break;

		case 5:
		default:
			return 0;


		}
	}
	return 0;
}

[Albatross]

Why?

-Albatross

P.S. Those strings you're using on lines 7, 9, 10, 18, 19, and 20 are classes too. std::cout and std::cin are objects too. From what you're saying, it sounds like you'd rather program in C.