const std = #import("std");
const expect = std.testing.expect;
const main = fn () *!void {
    var a: u8 = 255;
    var b: u8 = 1;
    const result = a +% b;
    try expect(result == 0);
    var c: u16 = 0;
    var d: u16 = 1;
    const sub_result = c -% d;
    try expect(sub_result == 65535);
}