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80 lines
1.6 KiB
80 lines
1.6 KiB
4 years ago
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## rgb_match
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### Instructions
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Implement the struct `Color` with the function `swap`.
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This function must allow you to swap the values of the struct.
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### Notions
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- https://doc.rust-lang.org/book/ch18-00-patterns.html
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### Expected functions
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```rust
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impl Color {
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fn swap(mut self, first: u8, second: u8) -> Color {}
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}
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```
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### Usage
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Here is a program to test your function.
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```rust
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struct Color {
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r: u8,
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g: u8,
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b: u8,
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a: u8,
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}
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fn main() {
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let c = Color {
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r: 255,
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g: 200,
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b: 10,
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a: 30,
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};
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println!("{:?}", c.swap(c.r, c.b));
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println!("{:?}", c.swap(c.r, c.g));
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println!("{:?}", c.swap(c.r, c.a));
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println!();
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println!("{:?}", c.swap(c.g, c.r));
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println!("{:?}", c.swap(c.g, c.b));
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println!("{:?}", c.swap(c.g, c.a));
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println!();
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println!("{:?}", c.swap(c.b, c.r));
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println!("{:?}", c.swap(c.b, c.g));
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println!("{:?}", c.swap(c.b, c.a));
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println!();
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println!("{:?}", c.swap(c.a, c.r));
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println!("{:?}", c.swap(c.a, c.b));
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println!("{:?}", c.swap(c.a, c.g));
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}
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```
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And its output
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```console
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student@ubuntu:~/[[ROOT]]/test$ cargo run
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Color { r: 10, g: 200, b: 255, a: 30 }
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Color { r: 200, g: 255, b: 10, a: 30 }
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Color { r: 30, g: 200, b: 10, a: 255 }
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Color { r: 200, g: 255, b: 10, a: 30 }
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Color { r: 255, g: 10, b: 200, a: 30 }
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Color { r: 255, g: 30, b: 10, a: 200 }
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Color { r: 10, g: 200, b: 255, a: 30 }
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Color { r: 255, g: 10, b: 200, a: 30 }
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Color { r: 255, g: 200, b: 30, a: 10 }
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Color { r: 30, g: 200, b: 10, a: 255 }
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Color { r: 255, g: 200, b: 30, a: 10 }
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Color { r: 255, g: 30, b: 10, a: 200 }
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student@ubuntu:~/[[ROOT]]/test$
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```
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