diff options
Diffstat (limited to 'exercises/047_methods.zig')
| -rw-r--r-- | exercises/047_methods.zig | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/exercises/047_methods.zig b/exercises/047_methods.zig index aee4c16..0e7bfa8 100644 --- a/exercises/047_methods.zig +++ b/exercises/047_methods.zig @@ -10,7 +10,7 @@ // pub fn hello() void { // std.debug.print("Foo says hello!\n", .{}); // } -// } +// }; // // 2. A function that is a member of a struct is a "method" and is // called with the "dot syntax" like so: @@ -23,10 +23,10 @@ // const Bar = struct{ // number: u32, // -// pub fn printMe(self: *Bar) void { +// pub fn printMe(self: Bar) void { // std.debug.print("{}\n", .{self.number}); // } -// } +// }; // // (Actually, you can name the first parameter anything, but // please follow convention and use "self".) @@ -55,10 +55,15 @@ const Alien = struct { .health = strength * 5, }; } +}; + +// Your trusty weapon. Zap those aliens! +const HeatRay = struct { + damage: u8, // We love this method: - pub fn zap(self: *Alien, damage: u8) void { - self.health -= if (damage >= self.health) self.health else damage; + pub fn zap(self: *HeatRay, alien: *Alien) void { + alien.health -= if (self.damage >= alien.health) alien.health else self.damage; } }; @@ -74,7 +79,7 @@ pub fn main() void { }; var aliens_alive = aliens.len; - var heat_ray_strength: u8 = 7; // We've been given a heat ray weapon. + var heat_ray = HeatRay{ .damage = 7 }; // We've been given a heat ray weapon. // We'll keep checking to see if we've killed all the aliens yet. while (aliens_alive > 0) { @@ -83,8 +88,8 @@ pub fn main() void { // Loop through every alien by reference (* makes a pointer capture value) for (aliens) |*alien| { - // *** Zap the Alien Here! *** - ???.zap(heat_ray_strength); + // *** Zap the alien with the heat ray here! *** + ???.zap(???); // If the alien's health is still above 0, it's still alive. if (alien.health > 0) aliens_alive += 1; |