Moved exercises to exercises because exercises

exercises/27_defer.zig

@@ -0,0 +1,25 @@
+//
+// You can assign some code to run _after_ a block of code exits by
+// deferring it with a "defer" statement:
+//
+//     {
+//         defer runLater();
+//         runNow();
+//     }
+//
+// In the example above, runLater() will run when the block ({...})
+// is finished. So the code above will run in the following order:
+//
+//     runNow();
+//     runLater();
+//
+// This feature seems strange at first, but we'll see how it could be
+// useful in the next exercise.
+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", .{});
+    std.debug.print("One ", .{});
+}