50 lines
1.4 KiB
Zig
50 lines
1.4 KiB
Zig
export executable "guess_number";
|
|
|
|
import "std.zig";
|
|
import "rand.zig";
|
|
|
|
error GetRandomFail;
|
|
error ReadInputFail;
|
|
|
|
pub fn main(args: [][]u8) %void => {
|
|
print_str("Welcome to the Guess Number Game in Zig.\n");
|
|
|
|
var seed : u32;
|
|
const seed_bytes = (&u8)(&seed)[0...@sizeof(u32)];
|
|
const err = os_get_random_bytes(seed_bytes);
|
|
if (err != @sizeof(u32)) {
|
|
// TODO full error message
|
|
fprint_str(stderr_fileno, "unable to get random bytes\n");
|
|
return error.GetRandomFail;
|
|
}
|
|
|
|
var rand : Rand;
|
|
rand.init(seed);
|
|
|
|
const answer = rand.range_u64(0, 100) + 1;
|
|
|
|
while (true) {
|
|
print_str("\nGuess a number between 1 and 100: ");
|
|
var line_buf : [20]u8;
|
|
var line_len : isize;
|
|
// TODO fix this awkward error handling
|
|
if (readline(line_buf, &line_len) || line_len == line_buf.len) {
|
|
// TODO full error message
|
|
fprint_str(stderr_fileno, "unable to read input\n");
|
|
return error.ReadInputFail;
|
|
}
|
|
|
|
var guess : u64;
|
|
if (parse_u64(line_buf[0...line_len - 1], 10, &guess)) {
|
|
print_str("Invalid number format.\n");
|
|
} else if (guess > answer) {
|
|
print_str("Guess lower.\n");
|
|
} else if (guess < answer) {
|
|
print_str("Guess higher.\n");
|
|
} else {
|
|
print_str("You win!\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|