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carbon-lang/examples/advent2024/day1_common.carbon
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Dana Jansensandzygoloid 24bde46181 Change array syntax from [T; N] to array(T, N) (#4981)
In line with the proposal in #4682, this changes the array syntax to be
array(T, N). `array` is a builtin keyword which must be followed by
parens containing two expressions and a separating comma.

The array type expression is still fully builtin, it does not forward to
a Core.Array library type yet. It merely adds the `ArrayType`
instruction, as was done with the previous syntax.

Followup work will change the instruction to reference to Core.Array,
once the library type exists and can be used directly.

---------

Co-authored-by: zygoloid <richard@metafoo.co.uk>
2025-02-20 22:42:47 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// https://adventofcode.com/2024/day/1
library "day1_common";
import library "io_utils";
// Read a sequence of lines each containing a pair of numbers into two arrays.
// Returns the number of lines read.
fn ReadInputs(ap: array(i32, 1000)*, bp: array(i32, 1000)*) -> i32 {
var n: i32 = 0;
var a: i32;
var b: i32;
while (n < 1000 and ReadInt(&a) and SkipSpaces() and ReadInt(&b) and SkipNewline()) {
(*ap)[n] = a;
(*bp)[n] = b;
++n;
}
return n;
}