50 lines
1.5 KiB
Zig
50 lines
1.5 KiB
Zig
const builtin = @import("builtin");
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const std = @import("std");
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const io = std.io;
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const fmt = std.fmt;
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const Rand = std.rand.Rand;
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const os = std.os;
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pub fn main() !void {
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var stdout_file = try io.getStdOut();
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var stdout_file_stream = io.FileOutStream.init(&stdout_file);
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const stdout = &stdout_file_stream.stream;
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var stdin_file = try io.getStdIn();
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try stdout.print("Welcome to the Guess Number Game in Zig.\n");
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var seed_bytes: [@sizeOf(usize)]u8 = undefined;
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os.getRandomBytes(seed_bytes[0..]) catch |err| {
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std.debug.warn("unable to seed random number generator: {}", err);
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return err;
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};
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const seed = std.mem.readInt(seed_bytes, usize, builtin.Endian.Big);
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var rand = Rand.init(seed);
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const answer = rand.range(u8, 0, 100) + 1;
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while (true) {
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try stdout.print("\nGuess a number between 1 and 100: ");
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var line_buf : [20]u8 = undefined;
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const line_len = stdin_file.read(line_buf[0..]) catch |err| {
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try stdout.print("Unable to read from stdin: {}\n", @errorName(err));
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return err;
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};
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const guess = fmt.parseUnsigned(u8, line_buf[0..line_len - 1], 10) catch {
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try stdout.print("Invalid number.\n");
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continue;
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};
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if (guess > answer) {
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try stdout.print("Guess lower.\n");
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} else if (guess < answer) {
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try stdout.print("Guess higher.\n");
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} else {
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try stdout.print("You win!\n");
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return;
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}
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}
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}
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