import java.util.Scanner;
import java.io.IOException;

/**
 PromptForInput02 is a second simple example of prompting for input
 in the style of "old school intro courses"---one that computes the
 area of a triangle. 

 I don't advocate this style of programming once students are beyond
 "training-wheels level examples"--there are better alternatives such
 as getting input from command line args, or reading from files-- I
 nevertheless feel obliged to provide examples of how to do it.

@author      Phill Conrad
@version     2010.12.30
@see <a href="http://proquest.safaribooksonline.com/book/programming/java/0596007019/input-and-output/javacook2-chp-10-sect-1">Java Cookbook 2nd edition, Recipe 10.1 (on campus)</a>
@see <a href="http://proquest.safaribooksonline.com.proxy.library.ucsb.edu:2048/book/programming/java/0596007019/input-and-output/javacook2-chp-10-sect-1">(off campus)</a>
*/

public class promptForInput02 {

    /** A main method to illustrate the "training wheels programming" 
        approach to computing area of a triangle.

        This method throws <code>IOException</code> to keep the example 
	relatively simple.    The alternative is a try/catch block

     @param args value is ignored
     
     */

    public static void main (String [] args) throws IOException {

	// One way to do this is to use the Scanner class.
   
	Scanner sc = new Scanner(System.in);      // Requires JDK 1.5   
	System.out.println("I'll help you compute the area of a triangle!");

	System.out.print("Please enter base: "); // like a printf (or cout << "prompt")
	double base = sc.nextDouble( );          //  like a scanf (or cin >> base)

	System.out.print("Please enter height: "); // like a printf (or cout << "prompt")
	double height = sc.nextDouble( );          //  like a scanf (or cin >> height)

	// compute and print answer

	System.out.println("The area of the triangle is: " + 0.5 * base * height);

    } // main


} // class promptForInput02