Authors:
Stuart Reges, Marty Stepp
Chapter:
Conditional Execution
Exercise:
Exercises
Question:16 | ISBN:9780136091813 | Edition: 2
Question
Write a method called quadrant that accepts as parameters a pair of double values representing an (x, y) point and returns the quadrant number for that point. Recall that quadrants are numbered as integers from 1 to 4 with the upper-right quadrant numbered 1 and the subsequent quadrants numbered in a counterclockwise fashion:
Notice that the quadrant is determined by whether the x and y coordinates are positive or negative numbers. Return 0 if the point lies on the x- or y-axis. For example, the call of quadrant(-2.3, 3.5) should return 2 and the call of quadrant(4.5, -4.5) should return 4.
Answer
package chap456;
public class Quadrent {
public int quadrent(double a, double b) {
// set quadrent to zero incase if it falls on x axis or y axis
int quadrent = 0;
if (a > 0 && b > 0)
quadrent = 1;
if (a < 0 && b > 0)
quadrent = 2;
if (a < 0 && b < 0)
quadrent = 3;
if (a > 0 && b < 0)
quadrent = 4;
return quadrent;
}
public static void main(String[] args) {
Quadrent que = new Quadrent();
int quadrentNumber = que.quadrent(4.5,-4.5);
System.out.println("the point lies in the " + quadrentNumber + " quadrent");
}
}
Output:
the point lies in the 4 quadrent