I am trying to do the following java assignment and every thing seems to work fine except when I put a number<4 or >10 it prints both "Invalid grade!"
"You didn't enter any data!" what I wanted is to print only "Invalid grade!" I tried to fix it but I couldn't.
Create a program that asks for results of exams and calculates the mean average of the grades. Grades are floating point numbers between 4 and 10. Program asks for grades until a negative number is typed. If user gives a grade other than a number between 4 and 10, the text "Invalid grade!" will be printed on screen and program asks for another grade. Finally the program prints the number of inputted grades and their mean average on screen as shown in the example print. If no grades were inputted, the notice "You did not input any grades." is the only thing printed on screen.
A double type variable is to be used to store the value of the average.
Program is written to a class called Average.
Example output
Program calculates the average of inputted grades.
Finish with a negative integer.
Input a grade (4-10): 5
Input a grade (4-10): 6,5
Input a grade (4-10): 7,5
Input a grade (4-10): 7
Input a grade (4-10): 0
Invalid grade!
Input a grade (4-10): -4
4 grades inputted.
Average of the grades: 6.5
Java Code:
import java.util.Scanner;
public class apples {
public static void main(String[] args)
int inputNumber=0;
int sum;
int count;
double average;
how to use Java and for my coursework I have been asked to construct an application that will read in the exam mark and coursework mark and then print out to 1 decimal place the average of the coursework and exam mark. When I submit it to the coursework submission system it says it's incorrect.
The answer that it's asking for is the answer that my code produces (ex = 71 cw = 40 mark = 55.5) But for some reason it says this when I submit it:
-#### << Differences between expected (<) your answer (>) >> ------------ 1c1 < ex= 91 cw = 80 mark = 85.5 --- > ex = 71 cw = 40 mark = 55.5 -------------------------------------------------------------------------
Check the above output for why this attempt failed And when I change the ex to 91 and cw to 80 it asks for > ex = 71 cw = 40 mark = 55.5 again.
class Main { public static void main( String args[] ) { int ExamMark=71; int CourseworkMark=40; double cost = (double)(ExamMark + CourseworkMark) / 2; System.out.printf("ex = " + ExamMark + " cw = " + CourseworkMark + " mark = " + cost); System.out.println(); } }
I have been asked to construct an application that will read in the exam mark and coursework mark and then print out to 1 decimal place the average of the coursework and exam mark. When I submit it it says it's incorrect.
class Main { public static void main( String args[] ) { int ExamMark=71; int CourseworkMark=40; double mark = (double)(ExamMark + CourseworkMark) / 2;
For some reason, the averages aren't calculating correctly. I'm aware I need to convert to double if I'm dividing by an odd amount but that itself isn't the issue. It's just simple easy divisible numbers that are not being calculated correctly. For instance, (10 + 10 + 10 + 50) / 4 = should be 2 but I get 10.
Here is the code:
import java.util.Scanner; public class Avg { public static void main(String[] args){ Scanner inputGains = new Scanner(System.in); int userInput = inputGains.nextInt();
Why is my program not calculating the total and average of the price of the items and not printing it out?
Java Code: /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package assignment4;
[code]...
It prints out everything but the total of the items and I dont know why. :(
So i'm using Netbeans and have created this template for the program i want to create. Basically what I want to do is enter a time and date in 24hr format including seconds and the date of start and end time and have the program calculate the time difference between Tool launch and tool Receive that takes into factor the Launch and Receive Dates for a total of hh:mm:ss duration. I don't know how to combine both those factors output one number in a total number of hours Duration. I'm also having problems linking the ODO (odometer) which the formula would basically be time/ODO (or distance in feet) = x.x ft/sec format.
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates and open the template in the editor. */
public class NewJFrame extends javax.swing.JFrame { /** * Creates new form NewJFrame */ public NewJFrame() { initComponents();
In the class, you will have three instance variables,
1) array to hold the numbers, 2) the odd average, and 3) the even average.
The constructor should accept as input the array from the tester class and assign it to the instance variable. You should then have a method, findAverage, that will read the array and then calculate the average of the even input values and the average of the odd input values. (Hint: You can use % (mod) to determine if a number is even or odd). Your program will need a getOddAverage and a getEvenAverage method.
public class oddEvenAverage { int [] myArray = new int[10]; public double oddAverage; public double evenAverage; public oddEvenAverage(int number){ int myArray = number;
[Code] .....
What am i doing wrong here? I can't get it working!
I have to write a program that takes an array of grades and calculate the average and then count the number of grades that are above average and also count the number of grades that are below average. This is what I have so far, it calculate the average and tells me how many are above average... where and how do I get to count how many are below average
public class arrays{ public static void main(String[] args) { final int grades = 5; double[] numbers = new double[grades]; double sum = 0;
I'm working on a homework assignment and I keep getting a compiler message this is the message
GradesAverage.java:44: error: variable totalgrade might not have been initialized System.out.println("Over all you have " + totalgrade); ^ 1 error
The homework is this Write a program that has variables to hold three test scores. The program should ask the user to enter three test scores and then assign the values entered to the variables. The program should display the average of the test stores and the letter grade that is assigned for the test score average. Use the grading scheme in the following table:
Test Score Average Letter Grade 90-100 A 80-89 B 70-79 C 60-69 D Below 60 F
This is my code
import javax.swing.JOptionPane; // Needed for JOptionPane class import java.util.Scanner; // Needed for the scanner class public class GradesAverage { public static void main (String[] args)
Four experiments are performed, each consisting of six tests. The number of test results for each experiment is entered by the user. Write a Java program using a nested loop to compute and display the average of the test results for each experiment.
You can run the program by entering the following test results:
Allow the user to specify the number of terms (5 terms are shown) to use in the computation. Each time around the loop only one extra term should be added to the estimate for PI.
Alter your solution from part one so that the user is allowed to specify the precision required between 1 and 8 digits (i.e. the number of digits which are correct; e.g. to 5 digits PI is 3.14159), rather than the number of terms. The condition on the loop should be altered so that it continues until the required precision is obtained. Note that you need only submit this second version of the program (assuming you have it working).
I'm trying to calculate sin(x) without using Math.sin(x). The formula for sin(x) is: x - x^3/3! + x^5/5! ... I can't seem to get the coding for the alternating +/- right. Here's my program:
import java.util.Scanner; import java.lang.Math; class Sin { public static void main(String[] args) { Scanner kb = new Scanner(System.in); int n, c, fact = 1, count = 1; double x, sum = 0, sum_sin = 0, result;
I'm working on some exercises and I'm having some problems with a method. I want to create a method to calculate the Factorial of an int number. I already wrote code that asks the user to input an int number and it calculates the Factorial, and it works fine
i.e.: if I input 5 it outputs
5! = 120
as it should. Here's the code:
import java.util.Scanner; public class Factorial1 { public static void main(String[] args) { Scanner input = new Scanner(System.in); int number; int total = 1;
[Code] ....
Now I want to make a method to re-use this code in other programs and I wrote this program:
public class TestClass { public static void main(String[] args) { System.out.print(factorial(5)); } public static int factorial(int x) { int total = 0;
[Code] ....
But when I run this program it outputs 0 instead of 120. What is wrong with this code as it compiles just fine but doesn't work as intended.
I am trying to calculate factorials using BlueJ. All of my factorials calculate correctly, I am just having an issue with something the instructor asked of us. She asked us to force the loop to stop when the user inputs "Calculate the factorial of 0", and not give any print.
So far I have my for loop with the correct conditions, I am just really confused as to how to make an if statement to stop the code when the input is 0.
I am working on the first example in this java game programming book. I am having trouble understanding this basic concept. How does the delta variable work throughout this class? I know the syntax I just don't understand the concept fully.
what I'm missing to calculate the Total Payout that Payroll has given out to two employees. the professor states that we have to use "getTotalPayout" . It would have been easy to do "(employee1.getFinal() + employee2.getFinal())" but he use getTotalPayout.
public class Payroll { private String employeeId; private int hourlyrate, hoursworked; private int increaseHours = 10; private double TotalPayout;
I am supposed to be doing a class assignment that calculates the area of a triangle and outputs with JOptionPane. I was able to fix some errors, but it's uncovering more errors.Here is my code:
public class Area { public static void main (String [] args) { double a, b, c; //Input sides of triangle double x; //Perimeter of triangle double area; //Area of triangle StringTokenizer st;
I'm trying to make a method that creates objects of a parameterized type randomly, but also to store the hashCode of different objects created and if at any time the percentage of different objects is less than 50% throw an exception.
This last part is where I've gotten stuck. I have created a population property where I store the different hashCodes and update it in the method adding the new hashCode from the new object. But I don't know how to do for to know if the percentage of different objects is less than 50%.
package fp.tipos.apps; import java.util.ArrayList; import java.util.Calendar; import java.util.GregorianCalendar; import java.util.List; import java.util.Random; public class FactoriaApps {
I'm currently in the process of creating a shopping cart simulation. The main GUI consists of two lists, one is a list of the inventory. (products stored within a .dat file which is automatically loaded upon launch) The other is blank and is to model my shopping basket. The idea is to be able to scan items from my inventory into the checkout basket. As this is happening i want a text field i created to dynamically update with the cost of all the items in the basket.
Below is the method for my scan button, which is supposed to perform the above :
public void actionPerformed(ActionEvent evt) { //Get the newly added list values. JList list = productList.getSelectedValuesList(); double totalAddedValue = 0.0; double oldCartValue = 0.0;
//program that calculates the circumference and area of a circle
import java.util.Scanner; public class circle{ public static void main(String[] args){ Scanner input= new Scanner( System.in); double r; //declares radius
[Code] .....
And here is what is displayed in the command prompt when I compile my code:
circle.java:17: error: cannot find symbol r.input.nextdouble();//entered the radius symbol: method nextdouble() location: variable input of type Scanner 1 error
I have to print points on a circle in increments of -0.1, but when I use a number larger than 1.3, the list stops at 0.1 larger than negRadius, and I don't know why. (Assume the center is (0,0))
public class PointsOnACircleV1 { public static void main(String[] args) { double radius = 1;
i want it to calculate my earnings say for 4 months and then output the result. it runs the loop asking for the 4 months worth of earnings but then it shows just the amount entered for the month and not total.
package Earnings; import java.util.Scanner; import java.lang.Math; public class Earnings { public static void main(String[] args) {
[code]....
i tried changing from double month to String month but it doesn't work.
