049

exercises/049_quiz6.zig

@@ -9,83 +9,90 @@
 //
 const std = @import("std");
 
-const Elephant = struct {
-    letter: u8,
-    tail: ?*Elephant = null,
-    trunk: ?*Elephant = null,
-    visited: bool = false,
-
-    // Elephant tail methods!
-    pub fn getTail(self: *Elephant) *Elephant {
-        return self.tail.?; // Remember, this means "orelse unreachable"
-    }
-
-    pub fn hasTail(self: *Elephant) bool {
-        return (self.tail != null);
-    }
-
-    // Your Elephant trunk methods go here!
-    // ---------------------------------------------------
-
-    ???
-
-    // ---------------------------------------------------
-
-    pub fn visit(self: *Elephant) void {
-        self.visited = true;
-    }
-
-    pub fn print(self: *Elephant) void {
-        // Prints elephant letter and [v]isited
-        const v: u8 = if (self.visited) 'v' else ' ';
-        std.debug.print("{u}{u} ", .{ self.letter, v });
-    }
+const Elephant = struct{
+  letter: u8,
+  tail: ?*Elephant = null,
+  trunk: ?*Elephant = null,
+  visited: bool = false,
+  
+  // Elephant tail methods!
+  pub fn getTail(self: *Elephant) *Elephant{
+    return self.tail.?; // Remember, this means "orelse unreachable"
+  }
+  
+  pub fn hasTail(self: *Elephant) bool{
+    return (self.tail != null);
+  }
+  
+  // Your Elephant trunk methods go here!
+  // ---------------------------------------------------
+  
+  pub fn getTrunk(self: *Elephant) *Elephant{
+    return self.trunk.?; // Remember, this means "orelse unreachable"
+  }
+  
+  pub fn hasTrunk(self: *Elephant) bool{
+    return (self.trunk != null);
+  }
+  
+  // ---------------------------------------------------
+  
+  pub fn visit(self: *Elephant) void{
+    self.visited = true;
+  }
+  
+  pub fn print(self: *Elephant) void{
+    // Prints elephant letter and [v]isited
+    const v: u8 = if(self.visited) 'v' else ' ';
+    std.debug.print("{u}{u} ", .{ self.letter, v });
+  }
 };
 
-pub fn main() void {
-    var elephantA = Elephant{ .letter = 'A' };
-    var elephantB = Elephant{ .letter = 'B' };
-    var elephantC = Elephant{ .letter = 'C' };
-
-    // We link the elephants so that each tail "points" to the next.
-    elephantA.tail = &elephantB;
-    elephantB.tail = &elephantC;
-
-    // And link the elephants so that each trunk "points" to the previous.
-    elephantB.trunk = &elephantA;
-    elephantC.trunk = &elephantB;
-
-    visitElephants(&elephantA);
-
-    std.debug.print("\n", .{});
+pub fn main() void{
+  var elephantA = Elephant{ .letter = 'A' };
+  var elephantB = Elephant{ .letter = 'B' };
+  var elephantC = Elephant{ .letter = 'C' };
+  
+  // We link the elephants so that each tail "points" to the next.
+  elephantA.tail = &elephantB;
+  elephantB.tail = &elephantC;
+  
+  // And link the elephants so that each trunk "points" to the previous.
+  elephantB.trunk = &elephantA;
+  elephantC.trunk = &elephantB;
+  
+  visitElephants(&elephantA);
+  
+  std.debug.print("\n", .{});
 }
 
 // This function visits all elephants twice, tails to trunks.
-fn visitElephants(first_elephant: *Elephant) void {
-    var e = first_elephant;
-
-    // We follow the tails!
-    while (true) {
-        e.print();
-        e.visit();
-
-        // This gets the next elephant or stops.
-        if (e.hasTail()) {
-            e = e.getTail();
-        } else {
-            break;
-        }
+fn visitElephants(first_elephant: *Elephant) void{
+  var e = first_elephant;
+  
+  // We follow the tails!
+  while(true){
+    e.print();
+    e.visit();
+    
+    // This gets the next elephant or stops.
+    if(e.hasTail()){
+      e = e.getTail();
+    }else{
+      break;
     }
-
-    // We follow the trunks!
-    while (true) {
-        e.print();
-
-        // This gets the previous elephant or stops.
-        if (e.hasTrunk()) {
-            e = e.getTrunk();
-        } else {
-            break;
-        }
+  }
+  
+  // We follow the trunks!
+  while(true){
+    e.print();
+    
+    // This gets the previous elephant or stops.
+    if(e.hasTrunk()){
+      e = e.getTrunk();
+    }else{
+      break;
     }
+  }
 }
+