mirror of
https://github.com/KaiserY/trpl-zh-cn
synced 2025-04-23 05:58:02 +08:00
15 lines
380 B
Rust
15 lines
380 B
Rust
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fn main() {
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let s1 = String::from("hello");
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let len = calculate_length(&s1);
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println!("The length of '{}' is {}.", s1, len);
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}
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// ANCHOR: here
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fn calculate_length(s: &String) -> usize { // s is a reference to a String
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s.len()
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} // Here, s goes out of scope. But because it does not have ownership of what
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// it refers to, nothing happens.
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// ANCHOR_END: here
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