using System;
using System.Collections.Generic;
using System.Text;

namespace Project1
{
    /// <summary>
    /// This interface defines the basic functions of
    /// manipulating data in Account Database.
    /// </summary>
    public interface AccountDatabase
    {
        /// <summary>
        /// Add an account record into the database
        /// </summary>
        /// <param name="ac">An object of Account</param>
        void add(Account ac);

        /// <summary>
        /// Remove an account record from the database
        /// </summary>
        /// <param name="ac">An object of Account</param>
        void remove(Account ac);

        /// <summary>
        /// Update an account record in the database
        /// </summary>
        /// <param name="ac">An object of Account</param>
        void update(Account ac);

        /// <summary>
        /// Search for an account record in the database
        /// </summary>
        /// <param name="acNo">The account number of an account record</param>
        /// <returns>An account that has the coresponding account number</returns>
        Account search(int acNo);
    }
}