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07a71fc322
* instead of emitting a breakpoint for a debug safety crash,
zig calls a panic function which prints an error message
and a stack trace and then calls abort.
* on freestanding OS, this panic function has a default
implementation of a simple infinite loop.
* users can override the panic implementation by providing
`pub fn panic(message: []const u8) -> unreachable { }`
* workaround for LLVM segfaulting when you try to use cold
calling convention on ARM.
closes #245
39 lines
1.1 KiB
Zig
39 lines
1.1 KiB
Zig
const std = @import("std");
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const io = std.io;
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const Rand = std.rand.Rand;
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const os = std.os;
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pub fn main(args: [][]u8) -> %void {
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%%io.stdout.printf("Welcome to the Guess Number Game in Zig.\n");
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var seed: [@sizeOf(usize)]u8 = undefined;
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%%os.getRandomBytes(seed);
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var rand: Rand = undefined;
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rand.init(([]usize)(seed)[0]);
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const answer = rand.rangeUnsigned(u8, 0, 100) + 1;
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while (true) {
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%%io.stdout.printf("\nGuess a number between 1 and 100: ");
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var line_buf : [20]u8 = undefined;
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const line_len = io.stdin.read(line_buf) %% |err| {
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%%io.stdout.printf("Unable to read from stdin: {}\n", @errorName(err));
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return err;
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};
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const guess = io.parseUnsigned(u8, line_buf[0...line_len - 1], 10) %% {
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%%io.stdout.printf("Invalid number.\n");
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continue;
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};
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if (guess > answer) {
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%%io.stdout.printf("Guess lower.\n");
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} else if (guess < answer) {
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%%io.stdout.printf("Guess higher.\n");
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} else {
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%%io.stdout.printf("You win!\n");
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return;
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}
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}
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}
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