progress

exercises/026_hello2.zig

@@ -28,5 +28,5 @@ pub fn main(init: std.process.Init) !void {
     // to be able to pass it up as a return value of main().
     //
     // We just learned of a single statement which can accomplish this.
-    stdout.print("Hello world!\n", .{});
+    try stdout.print("Hello world!\n", .{});
 }

exercises/027_defer.zig

@@ -20,6 +20,6 @@ const std = @import("std");
 pub fn main() void {
     // Without changing anything else, please add a 'defer' statement
     // to this code so that our program prints "One Two\n":
-    std.debug.print("Two\n", .{});
+    defer std.debug.print("Two\n", .{});
     std.debug.print("One ", .{});
 }

exercises/028_defer2.zig

@@ -20,7 +20,7 @@ pub fn main() void {
 fn printAnimal(animal: u8) void {
     std.debug.print("(", .{});
 
-    std.debug.print(") ", .{}); // <---- how?!
+    defer std.debug.print(") ", .{}); // <---- how?!
 
     if (animal == 'g') {
         std.debug.print("Goat", .{});
@@ -51,9 +51,9 @@ fn calculateTheUltimateQuestionOfLife() u32 {
 
     // Try reordering the statements to get the answer 42
     {
-        defer x = x / 10;
-        defer x = x + 11;
         defer x = x * 2;
+        defer x = x + 11;
+        defer x = x / 10;
     }
 
     return x;

exercises/029_errdefer.zig

@@ -32,7 +32,7 @@ fn makeNumber() MyErr!u32 {
 
     // Please make the "failed" message print ONLY if the makeNumber()
     // function exits with an error:
-    std.debug.print("failed!\n", .{});
+    errdefer std.debug.print("failed!\n", .{});
 
     var num = try getNumber(); // <-- This could fail!
 

exercises/030_switch.zig

@@ -46,6 +46,9 @@ pub fn main() void {
             // match for every possible value).  Please add an "else"
             // to this switch to print a question mark "?" when c is
             // not one of the existing matches.
+            else => {
+                std.debug.print("?", .{});
+            },
         }
     }
 

exercises/031_switch2.zig

@@ -29,6 +29,7 @@ pub fn main() void {
             // ...
             25 => 'Y',
             26 => 'Z',
+            else => '!',
             // As in the last exercise, please add the 'else' clause
             // and this time, have it return an exclamation mark '!'.
         };