13: switch-statements

This exercise is pending. Quick notes about this exercise:

• This will teach C++'s switch statement minus the feature of doing cases on classes.
• It will also introduce basic enum and how they work with switch statements.
• I will show you how to add a //falthrough to document explicitly that you want to fall through a case, which helps catch missing break.
• Also talk about how it's not like if-statements which can do a lot of comparisons, but switch really only does integers. (Even classes get converted to an integer apparently).

View Source file ex13.cpp Only

#include <iostream>
#include <fmt/core.h>

using namespace std;
using namespace fmt;

enum color { RED, GREEN, BLUE};

int main() {
  int which_door = 4;

  switch(which_door) {
    case 1:
      println("DOOR #1");
      break;
    case 2:
      println("DOOR #2");
      // fallthrough
    case 3:
      println("DOOR #3");
      break;
    case 4:
      println("DOOR #4");
      break;
    default:
      println("BAD DOOR YOU DIED!");
  }

  color what_color = RED;

  switch(what_color) {
    case RED:
      println("COLOR IS RED");
      break;
    case BLUE:
      println("COLOR IS BLUE");
      break;
    case GREEN:
      println("COLOR IS GREEN");
      break;
    default:
      // how can you hit this?
      println("BAD COLOR");
  }

  return 0;
}