// Checkout program using System; using System.IO; using System.Collections.Generic; class Submission { // ------------------------- // Globals // ------------------------- static List<string[]> products = new List<string[]>(); // ------------------------- // Subprograms // ------------------------- static void read_database() { } static int get_product() { } static void output_product(int button_number) { } static void transaction() { } // ------------------------- // Main program // ------------------------- public static void Main(string[] args) { } }