1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

// Copyright 2023 Google LLC
// SPDX-License-Identifier: Apache-2.0
fn transpose(matrix: [[i32; 3]; 3]) -> [[i32; 3]; 3] {
    let mut result = [[0; 3]; 3];
    for i in 0..3 {
        for j in 0..3 {
            result[j][i] = matrix[i][j];
        }
    }
    result
}

fn main() {
    let matrix = [
        [101, 102, 103], // <-- 这行注释会让 rustfmt 换行
        [201, 202, 203],
        [301, 302, 303],
    ];

    println!("Original:");
    for row in matrix {
        println!("{row:?}");
    }

    let transposed = transpose(matrix);

    println!("\nTransposed:");
    for row in transposed {
        println!("{row:?}");
    }
}