Authors:
Stuart Reges, Marty Stepp
Chapter:
Introduction To Parameters And Objects
Exercise:
Exercises
Question:9 | ISBN:9780136091813 | Edition: 2
Question
Write a method called distance that accepts four integer coordinates x1, y1, x2, and y2 as parameters and computes the distance between points (x1, y1) and (x2, y2) on the Cartesian plane. The equation for the distance is:
For example, the call of distance(1, 0, 4, 4) would return 5.0 and the call of distance(10, 2, 3, 5) would return 14.7648230602334.
Answer
Program:
public class Ch03Ex09
{
public static void main(String[] args)
{
double res1 = distance(1, 0, 4, 4);
double res2 = distance(10, 2, 3, 5);
System.out.println("distance(1, 0, 4, 4): " + res1);
System.out.println("distance(10, 2, 3, 5): " + res2);
}
public static double distance(int x1, int y1, int x2, int y2)
{
return Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));
}
}
Output:
distance(1, 0, 4, 4): 5.0
distance(10, 2, 3, 5): 7.615773105863909