#include<iostream>
#include<stdio.h>
using namespace std;

typedef struct
{
	char Ten[30];
	int sdt;
} danhba;

int nhap(int &n)
{
	cout<<"nhap SL DB: ";
	cin>>n;

	return 0;
}

int nhapluachon(int &chon)
{
	cout<<"\nnhap lua chon: ";
	cin>>chon;

	return chon;
}

void menu(void)
{
	cout<<"\n==============MENU=============\n";
	cout<<"\n1.xem danh sach";
	cout<<"\n2.them danh sach";
	cout<<"\n0.thoat";
}

void nhapds(danhba ds[50], int n)
{
	for(int i = 0;i < n;i++)
	{
		cout<<"\nnhap ten: ";
		fflush(stdin);
		gets(ds[i].Ten);
		cout<<"nhap sdt: ";
		cin>>ds[i].sdt;
	}
}

void themdb(danhba ds[], int n, int &m)
{
	cout<<"\nnhap SL DB ban muon them: ";
	cin>>m;

	for(int i = n;i < n + m;i++)
	{
		cout<<"nhap ten: ";
		fflush(stdin);
		gets(ds[i].Ten);
		cout<<"nhap sdt: ";
		cin>>ds[i].sdt;
	}
}

void xuatds(danhba ds[], int n, int m)
{
	for(int i = 0;i < n + m;i++)
	{
		cout<<"\nten: "<<ds[i].Ten;
		cout<<"\nsdt: "<<ds[i].sdt;
	}
}


int main()
{
	danhba ds[50];
	int n,m,chon;

	nhap(n);
	nhapds(ds,n);

	do
	{
		menu();
		nhapluachon(chon);

		switch(chon)
		{
			case 1:
			{
				xuatds(ds,n,m);
			} break;

			case 2:
			{
				themdb(ds,n,m);
			} break;
		}
	}
	while(chon != 0);

	return 0;
}