47 lines
1.4 KiB
Zig
47 lines
1.4 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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pub fn main() !void {
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const stdout = io.getStdOut().writer();
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const stdin = 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(u64)]u8 = undefined;
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std.crypto.randomBytes(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.readIntNative(u64, &seed_bytes);
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var prng = std.rand.DefaultPrng.init(seed);
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const answer = prng.random.intRangeLessThan(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 amt = try stdin.read(&line_buf);
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if (amt == line_buf.len) {
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try stdout.print("Input too long.\n", .{});
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continue;
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}
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const line = std.mem.trimRight(u8, line_buf[0..amt], "\r\n");
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const guess = fmt.parseUnsigned(u8, line, 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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