Moved exercises to exercises because exercises

exercises/03_assignment.zig

@@ -0,0 +1,48 @@
+//
+// It seems we got a little carried away making everything "const u8"!
+//
+//     "const" values cannot change.
+//     "u"     types are "unsigned" and cannot store negative values.
+//     "8"     means the type is 8 bits in size.
+//
+// Example: foo cannot change (it is CONSTant)
+//          bar can change (it is VARiable):
+//
+//     const foo: u8 = 20;
+//     var bar: u8 = 20;
+//
+// Example: foo cannot be negative and can hold 0 to 255
+//          bar CAN be negative and can hold −128 to 127
+//
+//     const foo: u8 = 20;
+//     var bar: i8 = -20;
+//
+// Example: foo can hold 8 bits (0 to 255)
+//          bar can hold 16 bits (0 to 65,535)
+//
+// You can do just about any combination of these that you can think of:
+// 
+//     u32 can hold 0 to 4,294,967,295
+//     i64 can hold −9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
+//
+// Please fix this program so that the types can hold the desired values
+// and the errors go away!
+//
+const std = @import("std");
+
+pub fn main() void {
+    const n: u8 = 50;
+    n = n + 5;
+
+    const pi: u8 = 314159;
+
+    const negative_eleven: u8 = -11;
+
+    // There are no errors in the next line, just explanation:
+    // Perhaps you noticed before that the print function takes two
+    // parameters. Now it will make more sense: the first parameter
+    // is a string. The string may contain placeholders '{}', and the
+    // second parameter is an "anonymous list literal" (don't worry
+    // about this for now!) with the values to be printed.
+    std.debug.print("{} {} {}\n", .{n, pi, negative_eleven});
+}