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