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use core::fmt; |
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/// This is the implementation of a Card. |
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/// Smart card! ;-) Can do a few things by herself. |
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#[derive(Debug)] |
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/// A playing Card. Knows its face `value` |
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/// and the punishment `points` (in the game |
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/// these are symbolised by little bull heads). |
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pub struct Card { |
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pub value: i8, |
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pub points: i8, |
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} |
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impl Card { |
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/// Generate a new card with the face `value` parameter. |
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/// Calculates the `points` for the value. |
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pub fn new(value: i8)->Self { |
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let mut points = 0; |
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if value % 10 == 5 { |
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// ends with 5 = 2 point |
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points = 2; |
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// println!("*5 add 1, val={}, pt={}", value, points); |
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} |
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if value % 10 == 0 { |
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// ends with 0 = 3 point |
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points = 3; |
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// println!("*0 add 2, val={}, pt={}", value, points); |
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} |
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if value % 10 == value / 10 { |
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// same numbers = 5 points (11,22,33... but 55=7) |
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points += 5; |
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// println!("NN add 5, val={}, pt={}", value, points); |
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} |
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if points == 0 { |
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// rest of the cards are 1 point |
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points = 1; |
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} |
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// Return a Card |
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Card { |
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value, |
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points, |
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} |
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} |
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} |
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impl fmt::Display for Card { |
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/// Print formatter for a card, so it can be written in `println!()` |
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fn fmt( &self, f: &mut fmt::Formatter ) -> fmt::Result { |
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write!(f, "(Card {}, points {})", self.value, self.points) |
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} |
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} |
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impl PartialEq for Card { |
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/// This is used for sorting cards. |
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fn eq(&self, other: &Self) -> bool { |
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self.value == other.value |
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} |
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} |
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/// This is used for sorting cards. Eq is required some by some strict sorting methods. |
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impl Eq for Card {} |
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impl PartialOrd for Card { |
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/// This is used for sorting cards. |
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fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> { |
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match self.value.partial_cmp(&other.value) { |
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Some(core::cmp::Ordering::Equal) => {None} |
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ord => return ord, |
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} |
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} |
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} |
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/// This is used for sorting cards. Ord (and Eq) is required some by some strict sorting methods. |
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impl Ord for Card { |
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fn cmp(&self, other: &Self) -> std::cmp::Ordering { |
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self.value.cmp(&other.value) |
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} |
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} |