Moved exercises to exercises because exercises

40_pointers2.zig

@@ -1,27 +0,0 @@
-//
-// It's important to note that variable pointers and constant pointers
-// are different types.
-//
-// Given:
-//
-//     var foo: u8 = 5;
-//     const bar: u8 = 5;
-// 
-// Then:
-//
-//     &foo is of type "*u8"
-//     &bar is of type "*const u8"
-//
-// You can always make a constant pointer to a variable, but you cannot
-// make a variable pointer to a constant. This sounds like a logic puzzle,
-// but it just means that once data is declared immutable, you can't
-// coerce it to a mutable type. It's a safety thing (to prevent mistakes).
-//
-const std = @import("std");
-
-pub fn main() void {
-    const a: u8 = 12;
-    const b: *u8 = &a; // fix this!
-
-    std.debug.print("a: {}, b: {}\n", .{a, b.*});
-}