panic.md

solutions/result-panic/panic.md

@@ -0,0 +1,37 @@
+
+2.
+```rust
+// MAKE the code work by fixing all panics
+fn main() {
+    assert_eq!("abc".as_bytes(), [96, 97, 98]);
+
+    let v = vec![1, 2, 3];
+    let ele = v[3];
+    // unwrap may panic when get return a None
+    let ele = v.get(3).unwrap();
+
+    // Sometimes, the compiler is unable to find the overflow errors for you in compile time ,so a panic will occur
+     let v = production_rate_per_hour(2);
+
+     // because of the same reason as above, we have to wrap it in a function to make the panic occur
+     divide(15, 0)
+}
+
+fn divide(x:u8, y:u8) {
+    println!("{}", x / y)
+}
+
+fn production_rate_per_hour(speed: u8) -> f64 {
+    let cph: u8 = 221;
+    match speed {
+        1..=4 => (speed * cph) as f64,
+        5..=8 => (speed * cph) as f64 * 0.9,
+        9..=10 => (speed * cph) as f64 * 0.77,
+        _ => 0 as f64,
+    }
+}
+
+pub fn working_items_per_minute(speed: u8) -> u32 {
+    (production_rate_per_hour(speed) / 60 as f64) as u32
+}
+```