[rust] Clock

1 files changed, 44 insertions, 0 deletions

diff --git a/clock/src/lib.rs b/clock/src/lib.rs
new file mode 100644
index 0000000..3ae8a62
--- /dev/null
+++ b/clock/src/lib.rs
@@ -0,0 +1,44 @@
+use std::fmt;
+use std::ops::Add;
+
+#[derive(Debug, PartialEq, Clone, Copy)]
+pub struct Clock {
+    hours: i32,
+    minutes: i32,
+}
+
+impl fmt::Display for Clock {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:02}:{:02}", self.hours, self.minutes)
+    }
+}
+
+impl Add<i32> for Clock {
+    type Output = Self;
+
+    fn add(self, minutes: i32) -> Self {
+        Self::new(self.hours, self.minutes + minutes)
+    }
+}
+
+/* impl From<Clock> for String {
+ *     fn from(c: Clock) -> String {
+ *         format!("{}",c)
+ *     }
+ * }
+ */
+
+impl Clock {
+    pub fn new(hours: i32, minutes: i32) -> Self {
+        let hours = hours + minutes / 60 - if minutes % 60 < 0 { 1 } else { 0 };
+        let hours = hours % 24;
+        let hours = hours + if hours < 0 { 24 } else { 0 };
+        let minutes = minutes % 60;
+        let minutes = minutes + if minutes < 0 { 60 } else { 0 };
+        Clock { hours, minutes }
+    }
+
+    pub fn add_minutes(self, minutes: i32) -> Self {
+        self + minutes
+    }
+}