Rust Program: Calculate distance between Points

Rust Structs and Enums: Exercise-3 with Solution

Write a Rust program that defines a struct Point with fields x and y. Now write a function to calculate the distance between two points.

Sample Solution:

Rust Code:

use std::f64;

// Define a struct named 'Point' with fields 'x' and 'y'
#[derive(Debug)]
struct Point {
    x: f64,
    y: f64,
}

// Implementation block for the 'Point' struct
impl Point {
    // Define a method named 'distance_to' that calculates the distance between two points
    fn distance_to(&self, other: &Point) -> f64 {
        // Calculate the distance using the Euclidean distance formula
        ((self.x - other.x).powi(2) + (self.y - other.y).powi(2)).sqrt()
    }
}

fn main() {
    // Create two points
    let point1 = Point { x: 1.0, y: 2.0 };
    let point2 = Point { x: 4.0, y: 6.0 };

    // Calculate the distance between the two points using the 'distance_to' method
    let distance = point1.distance_to(&point2);

    // Print the calculated distance
    println!("Distance between the points: {:.2}", distance);
}

Output:

Distance between the points: 5.00

Explanation:

Here is a brief explanation of the above Rust code:

• struct Point { ... }: Defines a struct named "Point" with two fields 'x' and 'y', both of type f64. This struct represents a point in a 2D Cartesian coordinate system.
• impl Point { ... }: Begins an implementation block for the "Point" struct.
• fn distance_to(&self, other: &Point) -> f64 { ... }: Defines a method named 'distance_to' that takes a reference to 'self' (an instance of "Point") and a reference to another "Point" instance (other) as parameters. It returns the calculated distance between the two points as a 'f64'.
• Inside the method:
• The distance between two points is calculated using the Euclidean distance formula: √((x_₂ - x_₁)^² + (y_₂ - y_₁)^²).
• In the main function,
• Two "Point" instances ('point1' and 'point2') are created with specific coordinates.
• The "distance_to()" method is called on 'point1' with a reference to 'point2' to calculate the distance between them.
• The calculated distance is printed to the console.

Rust Code Editor:

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