mirror of
https://github.com/ziglang/zig.git
synced 2026-01-16 20:35:17 +00:00
9e234d4208
* Merge io.InStream and io.OutStream into io.File
* Introduce io.OutStream and io.InStream interfaces
- io.File implements both of these
* Move mem.IncrementingAllocator to heap.IncrementingAllocator
Instead of:
```
%return std.io.stderr.printf("hello\n");
```
now do:
```
std.debug.warn("hello\n");
```
To print to stdout, see `io.getStdOut()`.
* Rename std.ArrayList.resizeDown to std.ArrayList.shrink.
46 lines
1.4 KiB
Zig
46 lines
1.4 KiB
Zig
const std = @import("std");
|
|
const io = std.io;
|
|
const fmt = std.fmt;
|
|
const Rand = std.rand.Rand;
|
|
const os = std.os;
|
|
|
|
pub fn main() -> %void {
|
|
var stdout_file = %return io.getStdOut();
|
|
const stdout = &stdout_file.out_stream;
|
|
|
|
var stdin_file = %return io.getStdIn();
|
|
const stdin = &stdin_file.in_stream;
|
|
|
|
%return stdout.print("Welcome to the Guess Number Game in Zig.\n");
|
|
|
|
var seed_bytes: [@sizeOf(usize)]u8 = undefined;
|
|
%%os.getRandomBytes(seed_bytes[0..]);
|
|
const seed = std.mem.readInt(seed_bytes, usize, true);
|
|
var rand = Rand.init(seed);
|
|
|
|
const answer = rand.range(u8, 0, 100) + 1;
|
|
|
|
while (true) {
|
|
%return stdout.print("\nGuess a number between 1 and 100: ");
|
|
var line_buf : [20]u8 = undefined;
|
|
|
|
const line_len = stdin.read(line_buf[0..]) %% |err| {
|
|
%return stdout.print("Unable to read from stdin: {}\n", @errorName(err));
|
|
return err;
|
|
};
|
|
|
|
const guess = fmt.parseUnsigned(u8, line_buf[0..line_len - 1], 10) %% {
|
|
%return stdout.print("Invalid number.\n");
|
|
continue;
|
|
};
|
|
if (guess > answer) {
|
|
%return stdout.print("Guess lower.\n");
|
|
} else if (guess < answer) {
|
|
%return stdout.print("Guess higher.\n");
|
|
} else {
|
|
%return stdout.print("You win!\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|