Adding exs 27-32

28_defer2.zig

@@ -0,0 +1,29 @@
+//
+// Now that you know how "defer" works, let's do something more
+// interesting with it.
+//
+const std = @import("std");
+
+pub fn main() void {
+    const animals = [_]u8{ 'g', 'c', 'd', 'd', 'g', 'z' };
+
+    for (animals) |a| printAnimal(a);
+
+    
+    std.debug.print("done.\n", .{});
+}
+
+// This function is _supposed_ to print an animal name in parentheses
+// like "(Goat) ", but we somehow need to print the end parenthesis
+// even though this function can return in four different places!
+fn printAnimal(animal: u8) void {
+    std.debug.print("(", .{});
+
+    std.debug.print(") ", .{}); // <---- how!?
+
+    if (animal == 'g'){ std.debug.print("Goat", .{}); return; }
+    if (animal == 'c'){ std.debug.print("Cat", .{}); return; }
+    if (animal == 'd'){ std.debug.print("Dog", .{}); return; }
+
+    std.debug.print("Unknown", .{});
+}