25 lines
772 B
Rust
25 lines
772 B
Rust
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//
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// compile-flags: -Ccodegen-units=1 -O
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fn linidx(row: usize, col: usize) -> usize {
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row * 1 + col * 3
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}
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fn main() {
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let mut mat = [1.0f32, 5.0, 9.0, 2.0, 6.0, 10.0, 3.0, 7.0, 11.0, 4.0, 8.0, 12.0];
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for i in 0..2 {
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for j in i+1..3 {
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if mat[linidx(j, 3)] > mat[linidx(i, 3)] {
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for k in 0..4 {
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let (x, rest) = mat.split_at_mut(linidx(i, k) + 1);
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let a = x.last_mut().unwrap();
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let b = rest.get_mut(linidx(j, k) - linidx(i, k) - 1).unwrap();
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::std::mem::swap(a, b);
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}
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}
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}
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}
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assert_eq!([9.0, 5.0, 1.0, 10.0, 6.0, 2.0, 11.0, 7.0, 3.0, 12.0, 8.0, 4.0], mat);
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}
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