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fn multiply(x: i64, y: u8) -> i64 { return x * (y as i64); } Here we convert u8to i64, which is possible since i64has a wider range than u8; but you c 阅读全文
posted @ 2024-02-24 19:01
Zhentiw
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https://doc.rust-lang.org/book/ch05-01-defining-structs.html struct ColorClassicStruct { red: i32, green: i32, blue: i32 } struct ColorTupleStruct(i32 阅读全文
posted @ 2024-02-23 19:11
Zhentiw
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fn main() { let cat = ("Furry McFurson", 3.5); let (name, age) = cat; println!("{} is {} years old.", name, age); } Example 2: #[test] fn indexing_tup 阅读全文
posted @ 2024-02-23 19:04
Zhentiw
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fn main() { let a = 0..100; if a.len() >= 100 { println!("Wow, that's a big array!"); } else { println!("Meh, I eat arrays like that for breakfast."); 阅读全文
posted @ 2024-02-23 18:57
Zhentiw
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struct Rectangle { width: i32, height: i32 } impl Rectangle { // Only change the test functions themselves pub fn new(width: i32, height: i32) -> Self 阅读全文
posted @ 2024-02-23 18:50
Zhentiw
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pub fn is_even(num: i32) -> bool { num % 2 == 0 } /* This attribute indicates that the following module is a conditional compilation module that shoul 阅读全文
posted @ 2024-02-23 18:46
Zhentiw
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Code has error: fn main() { let answer = square(3); println!("The square of 3 is {}", answer); } fn square(num: i32) -> i32 { num * num; } Error: ⚠️ C 阅读全文
posted @ 2024-02-23 15:39
Zhentiw
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Constants variable always need to be annotated: const NUMBER: i32 = 3; fn main() { println!("Number {}", NUMBER); } 阅读全文
posted @ 2024-02-23 15:02
Zhentiw
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Ref to : https://doc.rust-lang.org/book/ch03-01-variables-and-mutability.html#shadowing fn main() { let number = "T-H-R-E-E"; // don't change this lin 阅读全文
posted @ 2024-02-23 14:59
Zhentiw
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This lesson shows how to use a Rust loop to run a program infinitely. use std::io; use std::process; fn main() { loop { println!("Please enter a first 阅读全文
posted @ 2024-02-23 14:39
Zhentiw
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