Problem: Write a program that uses a structure to represent a point in 2D space. Implement a function that takes two points as parameters and calculates the distance between them. The program should prompt the user to input the coordinates of two points and display the calculated distance.

cppCopy code
#include <iostream>
#include <cmath>

// Structure to represent a 2D point
struct Point {
    double x;
    double y;
};

// Function to calculate the distance between two points
double calculateDistance(const Point& p1, const Point& p2) {
    double dx = p2.x - p1.x;
    double dy = p2.y - p1.y;
    return std::sqrt(dx*dx + dy*dy);
}

int main() {
    Point p1, p2;

    // Input coordinates for point 1
    std::cout << "Enter coordinates for Point 1:\n";
    std::cout << "x: ";
    std::cin >> p1.x;
    std::cout << "y: ";
    std::cin >> p1.y;

    // Input coordinates for point 2
    std::cout << "Enter coordinates for Point 2:\n";
    std::cout << "x: ";
    std::cin >> p2.x;
    std::cout << "y: ";
    std::cin >> p2.y;

    // Calculate distance between the two points
    double distance = calculateDistance(p1, p2);

    // Display the calculated distance
    std::cout << "Distance between the points: " << distance << std::endl;

    return 0;
}

In this example, we define a structure called Point that represents a 2D point with x and y coordinates.

The calculateDistance function takes two const references to Point structures (p1 and p2) as parameters. It calculates the difference in x and y coordinates between the two points, squares them, adds them, and returns the square root of the sum using the std::sqrt function.

In the main function, we declare two Point variables (p1 and p2) to store the coordinates of the two points. We prompt the user to input the x and y coordinates for each point.

Then, we call the calculateDistance function, passing p1 and p2 as arguments, and store the result in the distance variable.

Finally, we print the calculated distance between the two points.

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