FpError.java Source code

Introduction

Here is the source code for FpError.java

Source

/*
Java Programming for Engineers
Julio Sanchez
Maria P. Canton
    
    
ISBN: 0849308100
Publisher: CRC Press
*/

// Java for Engineers
//Filename: FpError
//Reference: Chapter 24
//Description:
//         Floating-pioint error diagnostics
//Requires:
//         Keyin class in current directory

class FpError {
    public static void main(String[] args) {
        double res;
        double divisor = 0;
        double dividend, root;

        // Get user input for numerator
        System.out.println("Forcing division by zero error");
        dividend = 10d;
        res = dividend / divisor;
        // Test for negative invifinity
        if (res == Double.NEGATIVE_INFINITY)
            System.out.println("result is NEGATIVE_INFINITY");
        if (res == Double.POSITIVE_INFINITY)
            System.out.println("result is POSITIVE_INFINITY");
        // Test for either infinity
        if (Double.isInfinite(res))
            System.out.println("result is infinite");

        // Get user input for square root
        System.out.println("\nCalculating square root (try negative)");
        root = 10d;
        res = Math.sqrt(root);
        if (Double.isNaN(res))
            System.out.println("result is Nan");
        else
            System.out.println("Square root = " + res);
    }
}