Moved exercises to exercises because exercises

exercises/05_arrays2.zig

@@ -0,0 +1,47 @@
+//
+// Zig has some fun array operators.
+//
+// You can use '++' to concatenate two arrays:
+//
+//   const a = [_]u8{ 1,2 };
+//   const b = [_]u8{ 3,4 };
+//   const c = a ++ b ++ [_]u8{ 5 }; // equals 1 2 3 4 5
+//
+// You can use '**' to repeat an array:
+//
+//   const d = [_]u8{ 1,2,3 } ** 2; // equals 1 2 3 1 2 3
+//
+const std = @import("std");
+
+pub fn main() void {
+    const le = [_]u8{ 1, 3 };
+    const et = [_]u8{ 3, 7 };
+
+    // (Problem 1)
+    // Please set this array concatenating the two arrays above.
+    // It should result in: 1 3 3 7
+    const leet = ???;
+
+    // (Problem 2)
+    // Please set this array to using repetition.
+    // It should result in: 1 0 0 1 1 0 0 1 1 0 0 1
+    const bit_pattern = [_]u8{ ??? } ** 3;
+
+    // Okay, that's all of the problems. Let's see the results.
+    //
+    // We could print these arrays with leet[0], leet[1],...but let's
+    // have a little preview of Zig "for" loops instead:
+    std.debug.print("LEET: ", .{});
+
+    for (leet) |*n| {
+        std.debug.print("{}", .{n.*});
+    }
+
+    std.debug.print(", Bits: ", .{});
+
+    for (bit_pattern) |*n| {
+        std.debug.print("{}", .{n.*});
+    }
+
+    std.debug.print("\n", .{});
+}