Prompt the user for two points x1 y1 y1 y2 Write a function

Prompt the user for two points (x1, y1), (y1, y2). Write a function that calculates the distance between the points. For a refresher on how to calculate the distance between two points, click here: http://www.mathwarehouse.com/algebra/distance_formula/index.php

Start with this code:

#include <iostream> // YOUR CODE GOES BELOW HERE

// TO HERE

// DO NOT CHANGE ANYTHING BELOW HERE   

int main() {   

double x1, y1, x2, y2;   

cout << \"Enter x1: \";   

cin >> x1;   

cout << x1 << endl;   

cout << \"Enter y1: \";   

cin >> y1;   

cout << y1 << endl;   

cout << \"Enter x2: \";   

cin >> x2;    cout << x2 << endl;   

cout << \"Enter y2: \";   

cin >> y2;   

cout << y2 << endl;   

cout << \"The distance is \";   

cout << distance(x1, y1, x2, y2) << endl;   

return 0; }

Sample run #1:

Enter x1: -5

Enter y1: 8

Enter x2: 0

Enter y2: -4

The distance is 13

MORE

Sample run #2:

Enter x1: 12.5

Enter y1: 18.7

Enter x2: -13.9

Enter y2: -29.5

The distance is 54.9563

Solution

Please follow the code and comments for description :

CODE :

#include <iostream> // required header files
#include <cmath>

using namespace std;

double distance(double x1, double y1, double x2, double y2); // function declaration

double distance(double x1, double y1, double x2, double y2) { // function initialisation
  
   double distancex = (x2 - x1) * (x2 - x1); // calculating the x distance
   double distancey = (y2 - y1) * (y2 - y1); // calculating the y distance
   double distance = sqrt(distancex + distancey); // calculating the distance between the points
   return distance; // return the value
}

int main() {   // driver method

   double x1, y1, x2, y2;   // required initialisations
  
   cout << \"Enter x1: \"; // prompt the message
   cin >> x1;
   cout << x1 << endl;
  
   cout << \"Enter y1: \";   // prompt the message
   cin >> y1;
   cout << y1 << endl;
  
   cout << \"Enter x2: \"; // prompt the message
   cin >> x2;  
   cout << x2 << endl;
  
   cout << \"Enter y2: \";   // prompt the message
   cin >> y2;
   cout << y2 << endl;
  
   cout << \"The distance is \";   // prompt the message
   cout << distance(x1, y1, x2, y2) << endl;   // prompt the result
  
   return 0;
  
}

OUTPUT :

Run 1 :

Enter x1: -5
-5
Enter y1: 8
8
Enter x2: 0
0
Enter y2: -4
-4
The distance is 13

Run 2 :

Enter x1: 12.5
12.5
Enter y1: 18.7
18.7
Enter x2: -13.9
-13.9
Enter y2: -29.5
-29.5
The distance is 54.9563

Hope this is helpful.