ziglings/exercises/038_structs2.zig

//
// Grouping values in structs is not merely convenient. It also allows
// us to treat the values as a single item when storing them, passing
// them to functions, etc.
//
// This exercise demonstrates how we can store structs in an array and
// how doing so lets us print them using a loop.
//
const std = @import("std");

const Role = enum{
  wizard,
  thief,
  bard,
  warrior,
};

const Character = struct{
  role: Role,
  gold: u32,
  health: u8,
  experience: u32,
};

pub fn main() void{
  var chars: [2]Character = undefined;
  
  // Glorp the Wise
  chars[0] = Character{
    .role = Role.wizard,
    .gold = 20,
    .health = 100,
    .experience = 10,
  };
  
  // Zump the Loud
  chars[1] = Character{
    .role = Role.bard,
    .gold = 10,
    .health = 100,
    .experience = 20,
  };
  
  // Please add "Zump the Loud" with the following properties:
  //
  //     role       bard
  //     gold       10
  //     health     100
  //     experience 20
  //
  // Feel free to run this program without adding Zump. What does
  // it do and why?
  
  // Printing all RPG characters in a loop:
  for(chars, 0..) |c, num|{
    std.debug.print("Character {} - G:{} H:{} XP:{}\n", .{
      num + 1, c.gold, c.health, c.experience,
    });
  }
}

// If you tried running the program without adding Zump as mentioned
// above, you get what appear to be "garbage" values. In debug mode
// (which is the default), Zig writes the repeating pattern "10101010"
// in binary (or 0xAA in hex) to all undefined locations to make them
// easier to spot when debugging.