Round-robin tournament schedule: Difference between revisions

</pre>

=={{header|Rust}}==

<syntaxhighlight lang="rust">

fn round_robin(n: usize) {

assert!(n >= 2);

let mut n = n;

let mut list1: Vec<usize> = (2..=n).collect();

if n % 2 == 1 {

list1.push(0); // 0 denotes a "bye".

n += 1;

}

for r in 1..n {

print!("Round {:2}:", r);

let list2 = vec![1].into_iter().chain(list1.iter().cloned()).collect::<Vec<_>>();

for i in 0..(n / 2) {

print!(" ({:>2} vs {:<2})", list2[i], list2[n - i - 1]);

}

println!();

list1.rotate_right(1);

}

}

fn main() {

println!("Round robin for 12 players:\n");

round_robin(12);

println!("\n\nRound robin for 5 players (0 denotes a bye):\n");

round_robin(5);

}

</syntaxhighlight>

{{out}}

<pre>

Round robin for 12 players:

Round 1: ( 1 vs 12) ( 2 vs 11) ( 3 vs 10) ( 4 vs 9 ) ( 5 vs 8 ) ( 6 vs 7 )

Round 2: ( 1 vs 11) (12 vs 10) ( 2 vs 9 ) ( 3 vs 8 ) ( 4 vs 7 ) ( 5 vs 6 )

Round 3: ( 1 vs 10) (11 vs 9 ) (12 vs 8 ) ( 2 vs 7 ) ( 3 vs 6 ) ( 4 vs 5 )

Round 4: ( 1 vs 9 ) (10 vs 8 ) (11 vs 7 ) (12 vs 6 ) ( 2 vs 5 ) ( 3 vs 4 )

Round 5: ( 1 vs 8 ) ( 9 vs 7 ) (10 vs 6 ) (11 vs 5 ) (12 vs 4 ) ( 2 vs 3 )

Round 6: ( 1 vs 7 ) ( 8 vs 6 ) ( 9 vs 5 ) (10 vs 4 ) (11 vs 3 ) (12 vs 2 )

Round 7: ( 1 vs 6 ) ( 7 vs 5 ) ( 8 vs 4 ) ( 9 vs 3 ) (10 vs 2 ) (11 vs 12)

Round 8: ( 1 vs 5 ) ( 6 vs 4 ) ( 7 vs 3 ) ( 8 vs 2 ) ( 9 vs 12) (10 vs 11)

Round 9: ( 1 vs 4 ) ( 5 vs 3 ) ( 6 vs 2 ) ( 7 vs 12) ( 8 vs 11) ( 9 vs 10)

Round 10: ( 1 vs 3 ) ( 4 vs 2 ) ( 5 vs 12) ( 6 vs 11) ( 7 vs 10) ( 8 vs 9 )

Round 11: ( 1 vs 2 ) ( 3 vs 12) ( 4 vs 11) ( 5 vs 10) ( 6 vs 9 ) ( 7 vs 8 )

Round robin for 5 players (0 denotes a bye):

Round 1: ( 1 vs 0 ) ( 2 vs 5 ) ( 3 vs 4 )

Round 2: ( 1 vs 5 ) ( 0 vs 4 ) ( 2 vs 3 )

Round 3: ( 1 vs 4 ) ( 5 vs 3 ) ( 0 vs 2 )

Round 4: ( 1 vs 3 ) ( 4 vs 2 ) ( 5 vs 0 )

Round 5: ( 1 vs 2 ) ( 3 vs 0 ) ( 4 vs 5 )

<syntaxhighlight lang="ecmascript">

import "./fmt" for Fmt

roundRobin.call(5)

</syntaxhighlight>