Inserted ex. 32 unreachable, added quiz4.

34_quiz4.zig

@@ -0,0 +1,24 @@
+//
+// Quiz time. See if you can make this program work!
+//
+// Solve this any way you like, just be sure the output is:
+//
+//     my_num=42
+//
+const std = @import("std");
+
+const NumError = error{ IllegalNumber };
+
+pub fn main() void {
+    const stdout = std.io.getStdOut().writer();
+
+    const my_num: u32 = getNumber();
+
+    try stdout.print("my_num={}\n", .{my_num});
+}
+
+// Just don't modify this function. It's "perfect" the way it is. :-)
+fn getNumber() NumError!u32 {
+    if( false ) return NumError.IllegalNumber;
+    return 42;
+}