Very quick java help

[Hayes]

Can someone please tell me why this will not work? It compiles but always determines the GPA to be 0.0. Thank you kindly. Rep to whoever can hlep

// Program:		GPACalculator.java
// Author:		Rob Hayes
// Date:		Oct. 4, 2007
// Description:	Calculate your Grade Point Average for the first semester.

import java.util.Scanner;		//Scanner class

class GPACalculator
{
	public static void main (String[] args)
	{		
		// Display a  title
		System.out.println();	// print a blank line
		System.out.println("Calculates the Grade Point Average of a Student");
		System.out.println("-----------------------------------------------");
		System.out.println();	// print a blank line
		
		// Create a Scanner object for user input
		Scanner input = new Scanner(System.in);
		
		// Read-in the user's grade points
		System.out.print("Enter the grade point for INFO 1136: ");
		double gp1 = input.nextDouble();
		
		System.out.print("Enter the grade point for INFO 1135: ");
		double gp2 = input.nextDouble();
		
		System.out.print("Enter the grade point for INFO 1119: ");
		double gp3 = input.nextDouble();
		
		System.out.print("Enter the grade point for INFO 1120: ");
		double gp4 = input.nextDouble();
		
		System.out.print("Enter the grade point for BUSI 1005: ");
		double gp5 = input.nextDouble();
		
		System.out.print("Enter the grade point for BUSI 1060: ");
		double gp6 = input.nextDouble();
		
		// Determine the weighted grade point taking into consideration the amount of credits per course
		double wGP1 = gp1 * (5 / 20);
		double wGP2 = gp2 * (5 / 20);
		double wGP3 = gp3 * (3 / 20);
		double wGP4 = gp4 * (3 / 20);
		double wGP5 = gp5 * (3 / 20);
		double wGP6 = gp6 * (1 / 20);
		
		//  Determine the GPA by adding up the weighted grade points
		double GPA = (wGP1 + wGP2 + wGP3 + wGP4 + wGP5 + wGP6);
		
		System.out.print("Your GPA = " + GPA + " for 20 credit units");
	}
}

 

[neroux]

That should work.

// Program:		GPACalculator.java
// Author:		Rob Hayes
// Date:		Oct. 4, 2007
// Description:	Calculate your Grade Point Average for the first semester.

import java.util.Scanner;		//Scanner class

class GPACalculator
{
	public static void main (String[] args)
	{		
		// Display a  title
		System.out.println();	// print a blank line
		System.out.println("Calculates the Grade Point Average of a Student");
		System.out.println("-----------------------------------------------");
		System.out.println();	// print a blank line
		
		// Create a Scanner object for user input
		Scanner input = new Scanner(System.in);
		
		// Read-in the user's grade points
		System.out.print("Enter the grade point for INFO 1136: ");
		double gp1 = input.nextDouble();
		
		System.out.print("Enter the grade point for INFO 1135: ");
		double gp2 = input.nextDouble();
		
		System.out.print("Enter the grade point for INFO 1119: ");
		double gp3 = input.nextDouble();
		
		System.out.print("Enter the grade point for INFO 1120: ");
		double gp4 = input.nextDouble();
		
		System.out.print("Enter the grade point for BUSI 1005: ");
		double gp5 = input.nextDouble();
		
		System.out.print("Enter the grade point for BUSI 1060: ");
		double gp6 = input.nextDouble();
		
		// Determine the weighted grade point taking into consideration the amount of credits per course
		double wGP1 = gp1 * 5 / 20;
		double wGP2 = gp2 * 5 / 20;
		double wGP3 = gp3 * 3 / 20;
		double wGP4 = gp4 * 3 / 20;
		double wGP5 = gp5 * 3 / 20;
		double wGP6 = gp6 * 1 / 20;
		
		//  Determine the GPA by adding up the weighted grade points
		double GPA = (wGP1 + wGP2 + wGP3 + wGP4 + wGP5 + wGP6);
		
		System.out.print("Your GPA = " + GPA + " for 20 credit units");
	}
}

 

[sky]

Have you put debbugging statements in to confirm that the values you've read in from user input are not somehow being interpreted as 0?