Add a exercise to module 13

exercises/12/hello_cout/README.md

@@ -1,3 +1,5 @@
+[< Back](../README.md)
+
 # Exercise: Hello std::cout on Godbolt.org
 
 ## Background: Compiler Explorer

exercises/12/hello_fmt/README.md

@@ -1,3 +1,5 @@
+[< Back](../README.md)
+
 # Exercise: Hello {fmt} on Godbolt
 
 ## Background: {fmt}

exercises/13/README.md

@@ -1 +1,3 @@
 [< Back](../README.md)
+
+* [Exercise: Navigating the code](navigate_codebase/README.md)

exercises/13/navigate_codebase/README.md

@@ -1,4 +1,8 @@
-# Pac-Man
+[< Back](../README.md)
+
+# Exercise: Navigating the code
+
+## Background: Pac-Man project
 
 The project is split into three parts (solutions).
 
@@ -7,7 +11,7 @@ The project is split into three parts (solutions).
   and call the `run()` function
 - **pacman_tests** - All of the unit tests for the game
 
-## libpacman
+### libpacman
 
 The libpacman solution has 3 main parts.
 
@@ -16,7 +20,7 @@ The libpacman solution has 3 main parts.
 - **GameState** - A class that holds all of the state for Pac-Man. Contains classes like the Ghosts, PacMan and the
   Pellets PacMan eats
 
-## Updating the game state
+### Updating the game state
 
 Within the `Game.cpp` file there is a function called `run()`, this function draws the current game state to
 screen `canvas.update(gameState);` but it only calls the game state update function at a fixed interval, it also sends
@@ -26,37 +30,31 @@ Then in the `step()` function in `GameState.cpp` the magic happens. Each object
 state of the game world is checked. Did Pac-Man just eat a pellet? Are the ghosts touching Pac-Man? Which direction is
 Pac-Man moving?
 
-## The game board
+### The game board
 
 The game board is stored as a two dimensional array of integers in the `Board.cpp` file. The array itself is only
 accessible within that file, which is why we export helper functions that use the array as a global variable. This
 exporting happens in `Board.hpp`
 
-## Ghosts
+### Ghosts
 
 All ghosts inherit from the parent Ghost class defined in `Ghost.hpp/cpp`, there are a couple of pure virtual functions
 those ghosts need to implement, otherwise you are not able to create an instance of them. A ghost stores its current
 location, its current target and other state regarding if it is frightened or not. At each `update()` call a ghost needs
 to decide what its target is and which direction it should turn next.
 
-## Pac-Man
+### Pac-Man
 
 Pac-Man has similar state to a Ghost, like direction and position. Pac-Man's behavior is also similar in `update()` as
 we need to determine where to place Pac-Man in the next game state. But the information on which direction to turn comes
 from the player (or a bot).
 
-## Unit tests
+### Unit tests
 
 Because updates of game state and drawing the game on screen are completely separate, we can create game state within
 unit tests and give it arbitrary delta time and call whatever functions we want to simulate the game being played. Most
 unit tests only focus on one single class but some (like `testFruits`) use the `GameState` class.
 
-## Ghosts characters and algorithms
+## Exercise
 
-These will probably become relevant
-* https://en.wikipedia.org/wiki/Ghosts_(Pac-Man)
-* [Video: Pac-Man Ghost AI Explained](https://youtu.be/ataGotQ7ir8)
-* https://gameinternals.com/understanding-pac-man-ghost-behavior
-* https://www.gamasutra.com/view/feature/3938/the_pacman_dossier.php?print=1
-* https://www.slideshare.net/grimlockt/pac-man-6561257
-* http://donhodges.com/pacman_pinky_explanation.htm
+1. Familiarize yourself with the codebase by trying to find the files that contain the code mentioned in the slides

exercises/README.md

@@ -23,3 +23,14 @@
 ## Advanced
 
 * [Advanced](advanced/README.md)
+
+## Ghosts characters and algorithms
+
+These will probably become relevant
+* https://en.wikipedia.org/wiki/Ghosts_(Pac-Man)
+* [Video: Pac-Man Ghost AI Explained](https://youtu.be/ataGotQ7ir8)
+* https://gameinternals.com/understanding-pac-man-ghost-behavior
+* https://www.gamasutra.com/view/feature/3938/the_pacman_dossier.php?print=1
+* https://www.slideshare.net/grimlockt/pac-man-6561257
+* http://donhodges.com/pacman_pinky_explanation.htm
+*