add: struct exercises and quiz

24-structs/exercises/03-query-by-id/main.go

@@ -0,0 +1,47 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Query By Id
+//
+//  Add a new command: "id". So the users can query the games
+//  by id.
+//
+//  1. Before the loop, index the games by id (use a map).
+//
+//  2. Add the "id" command.
+//     When a user types: id 2
+//     It should print only the game with id: 2.
+//
+//  3. Handle the errors:
+//
+//     id
+//     wrong id
+//
+//     id HEY
+//     wrong id
+//
+//     id 10
+//     sorry. i don't have the game
+//
+//     id 1
+//     #1: "god of war" (action adventure) $50
+//
+//     id 2
+//     #2: "x-com 2" (strategy) $40
+//
+//
+// EXPECTED OUTPUT
+//  Please also run the solution and try the program with
+//  list, quit, and id commands to see it in action.
+// ---------------------------------------------------------
+
+func main() {
+	// use your solution from the previous exercise
+}