Added ex. 37,38 structs
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4 changed files with 122 additions and 3 deletions
59
37_structs.zig
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59
37_structs.zig
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//
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// Being able to group values together lets us turn this:
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//
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// point1_x = 3;
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// point1_y = 16;
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// point1_z = 27;
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// point2_x = 7;
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// point2_y = 13;
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// point2_z = 34;
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//
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// into this:
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//
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// point1 = Point{ .x=3, .y=16, .y=27 };
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// point2 = Point{ .x=7, .y=13, .y=34 };
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//
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// The Point above is an example of a "struct" (short for "structure").
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// Here's how it could have been defined:
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//
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// const Point = struct{ x: u32, y: u32, z: u32 };
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//
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// Let's store something fun with a struct: a roleplaying character!
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//
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const std = @import("std");
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// We'll use an enum to specify the character class.
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const Class = enum{
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wizard,
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thief,
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bard,
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warrior,
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};
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// Please add a new property to this struct called "health" and make
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// it a u8 integer type.
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const Character = struct{
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class: Class,
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gold: u32,
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experience: u32,
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};
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pub fn main() void {
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// Please initialize Glorp with 100 health.
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var glorp_the_wise = Character{
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.class = Class.wizard,
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.gold = 20,
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.experience = 10,
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};
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// Glorp gains some gold.
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glorp_the_wise.gold += 5;
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// Ouch! Glorp takes a punch!
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glorp_the_wise.health -= 10;
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std.debug.print("Your wizard has {} health and {} gold.", .{
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glorp_the_wise.health,
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glorp_the_wise.gold
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});
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}
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53
38_structs2.zig
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53
38_structs2.zig
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@ -0,0 +1,53 @@
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//
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// Grouping values in structs is not merely convenient. It also allows
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// us to treat the values as a single item when storing them, passing
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// them to functions, etc.
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//
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// This exercise demonstrates how we can store structs in an array and
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// how doing so lets us print them all (both) using a loop.
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//
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const std = @import("std");
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const Class = enum{
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wizard,
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thief,
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bard,
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warrior,
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};
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const Character = struct{
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class: Class,
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gold: u32,
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health: u8,
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experience: u32,
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};
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pub fn main() void {
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var chars: [2]Character = undefined;
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// Glorp the Wise
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chars[0] = Character{
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.class = Class.wizard,
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.gold = 20,
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.health = 100,
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.experience = 10,
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};
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// Please add "Zump the Loud" with the following properties:
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//
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// class bard
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// gold 10
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// health 100
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// experience 20
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//
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// Feel free to run this program without adding Zump. What does
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// it do and why?
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// Printing all RPG characters in a loop:
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for (chars) |c, num| {
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std.debug.print("Character {} - G:{} H:{} XP:{}\n",
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.{num+1, c.gold, c.health, c.experience});
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}
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std.debug.print("\n", .{});
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}
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@ -11,9 +11,10 @@ project for the [Rust](https://www.rust-lang.org/) language.
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## Intended Audience
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## Intended Audience
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This will probably be quite difficult if you've _never_ programmed before.
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This will probably be difficult if you've _never_ programmed before.
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However, no specific programming experience is required. And in particular,
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But no specific programming experience is required. And in particular,
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you are _not_ expected to know C or other "systems programming" language.
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you are _not_ expected to have any prior experience with "systems programming"
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or a "systems" level language such as C.
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Each exercise is self-contained and self-explained. However, you're encouraged
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Each exercise is self-contained and self-explained. However, you're encouraged
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to also check out these Zig language resources for more detail:
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to also check out these Zig language resources for more detail:
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6
ziglings
6
ziglings
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@ -68,6 +68,10 @@ function check_it {
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fi
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fi
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}
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}
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# I've chosen to explicitly number AND list each exercise rather than rely
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# on sorting. Though it does mean manually renaming things to remove/insert,
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# it's worked out well so far because its explicit and foolproof.
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check_it 01_hello.zig "Hello world" "Note the error: the source file has a hint for fixing 'main'."
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check_it 01_hello.zig "Hello world" "Note the error: the source file has a hint for fixing 'main'."
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check_it 02_std.zig "Standard Library"
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check_it 02_std.zig "Standard Library"
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check_it 03_assignment.zig "55 314159 -11" "There are three mistakes in this one!"
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check_it 03_assignment.zig "55 314159 -11" "There are three mistakes in this one!"
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@ -104,6 +108,8 @@ check_it 33_iferror.zig "2<4. 3<4. 4=4. 5>4. 6>4." "Seriously, what's the deal w
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check_it 34_quiz4.zig "my_num=42" "Can you make this work?"
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check_it 34_quiz4.zig "my_num=42" "Can you make this work?"
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check_it 35_enums.zig "1 2 3 9 8 7" "This problem seems familiar..."
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check_it 35_enums.zig "1 2 3 9 8 7" "This problem seems familiar..."
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check_it 36_enums2.zig "#0000ff" "I'm feeling blue about this."
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check_it 36_enums2.zig "#0000ff" "I'm feeling blue about this."
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check_it 37_structs.zig "Your wizard has 90 health and 25 gold."
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check_it 38_structs2.zig "Character 2 - G:10 H:100 XP:20"
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echo
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echo
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echo " __ __ _ "
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echo " __ __ _ "
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