Zig 猜数字

const std = @import("std");
pub fn main() !void {
    const rand = std.crypto.random;
    const target_number = rand.intRangeAtMost(u8, 0, 255);
    while (true) {
        const stdin = std.io.getStdIn().reader();
        const stdout = std.io.getStdOut().writer();
        const bare_line = try stdin.readUntilDelimiterAlloc(
            std.heap.page_allocator,
            '\n',
            8192,
        );
        defer std.heap.page_allocator.free(bare_line);
        const line = std.mem.trim(u8, bare_line, "\r");
        const guess = std.fmt.parseInt(u8, line, 10) catch |err| switch (err) {
            error.Overflow => {
                try stdout.writeAll("Enter\n");
                continue;
            },
            error.InvalidCharacter => {
                try stdout.writeAll("Invalid Input\n");
                continue;
            },
        };
        if (guess < target_number) try stdout.writeAll("Too Small\n");
        if (guess > target_number) try stdout.writeAll("Too Big\n");
        if (guess == target_number) {
            try stdout.writeAll("Correct!\n");
            break;
        }
    }
}
test {
    std.testing.refAllDecls(@This());
}