/* File: week2_5a
* Author: Matt Faulkner
* Date: 4 June 07
* Class: CMIS 141
* Instructor: Dr. Yuan
* Problem: 2.33, pg 97, Java 5.0 Programming Guide
* Purpose: Evaluate 3x^4 - 10x^3 + 13
* Status: Ready
* Notes: Exception handling needs to be added
* History:
* 4 Jun 07 - Start/End
*
*/

import java.util.*;


public class week2_5a {
	public static void main (String[] args) {
	

	//Set up input stream
	Scanner stdin = new Scanner(System.in);

	//Legend
	System.out.print("The program will evaluate the expression ");
	System.out.println("3x^4 - 10x^3 + 13\n\n");
	
	//Receive input for value x in equation
	System.out.print("Enter a floating point number: ");
	float x = stdin.nextFloat(); //x is the input value from the user
	
		//Calculates x to the third power
		double toTheThird = Math.pow (x, 3);
		
		//Calculates x to the fourth power
		double toTheFourth = Math.pow (x, 4);
		
		double answer = (3 * toTheFourth) - (10 * toTheThird) + 13;
		
		System.out.print("Based on your input of " + x + ", the value of"); 
		System.out.println ("3x^4 - 10x^3 + 13 = " + answer + ".\n\n\n");
	
	} // end method main
	
} // end class week2_5