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81 lines
1.6 KiB
81 lines
1.6 KiB
#[allow(dead_code)]
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#[derive(Debug)]
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struct Person {
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name: String,
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age: u8,
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}
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struct Unit;
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struct Pair(i32, f32);
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#[derive(Debug)]
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struct Point {
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x: f32,
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y: f32,
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}
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#[derive(Debug)]
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struct Rectangle {
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top_left: Point,
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bottom_right: Point,
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}
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fn rect_area(r: Rectangle) -> f32 {
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(r.top_left.x - r.bottom_right.x) * (r.top_left.y - r.bottom_right.y)
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}
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fn square(p: &Point, d: f32) -> Rectangle {
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Rectangle {
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top_left: Point { x: p.x + d, y: p.y },
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bottom_right: Point { x: p.x, y: p.y + d },
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}
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}
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fn main() {
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let name = String::from("Peter");
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let age = 27;
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let peter = Person { name, age };
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println!("{:?}", peter);
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let point: Point = Point { x: 10.3, y: 0.4 };
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println!("point coordinates: ({}, {})", point.x, point.y);
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let bottom_right = Point { x: 5.2, y: 0.2 };
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println!("second point: ({}, {})", bottom_right.x, bottom_right.y);
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let Point {
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x: left_edge,
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y: top_edge,
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} = point;
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let rect = Rectangle {
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top_left: Point {
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x: left_edge,
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y: top_edge,
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},
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bottom_right: bottom_right,
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};
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let _unit = Unit;
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let pair = Pair(1, 0.1);
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println!("pair contains {:?} and {:?}", pair.0, pair.1);
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let Pair(integer, decimal) = pair;
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println!("pair contains {:?} and {:?}", integer, decimal);
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println!("rect in {:?}", rect);
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println!("area of rect is {}", rect_area(rect));
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let lower_left = Point { x: 4.1, y: 11.3 };
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let d = 7.7f32;
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let sq = square(&lower_left, d);
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println!("sq from point={:?} of d={} is {:?}", lower_left, d, sq);
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}
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