27 lines
730 B
Plaintext
27 lines
730 B
Plaintext
extern crate rand;
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use rand::Rng;
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#[derive(Clone, Copy, PartialEq)]
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enum Prize {Goat , Car}
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const GAMES: usize = 3_000_000;
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fn main() {
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let mut switch_wins = 0;
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let mut rng = rand::thread_rng();
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for _ in 0..GAMES {
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let mut doors = [Prize::Goat; 3];
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*rng.choose_mut(&mut doors).unwrap() = Prize::Car;
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// You only lose by switching if you pick the car the first time
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if rng.choose(&doors).unwrap() != &Prize::Car {
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switch_wins += 1;
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}
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}
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println!("I played the game {total} times and won {wins} times ({percent}%).",
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total = GAMES,
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wins = switch_wins,
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percent = switch_wins as f64 / GAMES as f64 * 100.0
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);
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}
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