corrected @bitReverse for only 1 arg, instead of 2 args

1 files changed, 2 insertions, 3 deletions

diff --git a/exercises/064_builtins.zig b/exercises/064_builtins.zig
index 018bf95..1a0d263 100644
--- a/exercises/064_builtins.zig
+++ b/exercises/064_builtins.zig
@@ -76,8 +76,7 @@ pub fn main() void {
 
     // Here's a fun one:
     //
-    //   @bitReverse(comptime T: type, integer: T) T
-    //     * 'T' will be the type of the input and output.
+    //   @bitReverse(integer: anytype) T
     //     * 'integer' is the value to reverse.
     //     * The return value will be the same type with the
     //       value's bits reversed!
@@ -85,6 +84,6 @@ pub fn main() void {
     // Now it's your turn. See if you can fix this attempt to use
     // this builtin to reverse the bits of a u8 integer.
     const input: u8 = 0b11110000;
-    const tupni: u8 = @bitReverse(input);
+    const tupni: u8 = @bitReverse(input, tupni);
     print("{b:0>8} backwards is {b:0>8}.\n", .{ input, tupni });
 }