Moved exercises to exercises because exercises

35_enums.zig

@@ -1,49 +0,0 @@
-//
-// Remember that little mathematical virtual machine we made using the
-// "unreachable" statement?  Well, there were two problems with the
-// way we were using op codes:
-//
-//   1. Having to remember op codes by number is no good.
-//   2. We had to use "unreachable" because Zig had no way of knowing
-//      how many valid op codes there were.
-// 
-// An "enum" is a Zig construct that lets you give names to numeric
-// values and store them in a set. They look a lot like error sets:
-//
-//     const Fruit = enum{ apple, pear, orange };
-//
-//     const my_fruit = Fruit.apple;
-//
-// Let's use an enum in place of the numbers we were using in the
-// previous version!
-// 
-const std = @import("std");
-
-// Please complete the enum!
-const Ops = enum{ ??? };
-
-pub fn main() void {
-    const operations = [_]Ops{
-        Ops.inc,
-        Ops.inc,
-        Ops.inc,
-        Ops.pow,
-        Ops.dec,
-        Ops.dec
-    };
-
-    var current_value: u32 = 0;
-
-    for (operations) |op| {
-        switch (op) {
-            Ops.inc  => { current_value += 1; },
-            Ops.dec  => { current_value -= 1; },
-            Ops.pow  => { current_value *= current_value; },
-            // No "else" needed! Why is that?
-        }
-
-        std.debug.print("{} ", .{current_value});
-    }
-
-    std.debug.print("\n", .{});
-}