Calculating Average Of Two Ints And Converting To A Double
Oct 31, 2014
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;
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 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;
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. :(
I am trying to convert the double grossPay to 2 decimal places but cannot get it to work ,I am unsure of the correct way of doing this but this is how far I can get
I am supposed to write a program on PuTTY using UNIX (I have Windows 8), but I am not comfortable with it yet, so I am using Java through NetBeans (IDE 7.4).
The program has to follow these instructions (ignore the Linux part of the instructions, the rest is in bold):
Write a program on the Linux system using the putty utility. The program should get strings of data from the command line (that is, look for the data in the "args" array of strings). Use a loop to convert each of the strings in the array into a double and add the number to a total. Print the total after all of the strings have been processed.
The program will use try-catch to catch any error that occurs. If an error occurs, the program will print a message saying that the error occurred. The program can end at that point.
You should create the Java program using the nano editor. The input data should be a list of numbers on the line that runs the program.
The problem so far is that I keep getting an error when converting a String value into a new double value. I have yet to code the try-catch method in my program
Java Code:
import java.util.*; public class Program13Strings { public static void main(String[] args) { Scanner scan = new Scanner (System.in); System.out.println("How many lines of data do you wish to enter?"); int size = scan.nextInt();
[Code] ....
*NOTE: right where my code says double newDouble = Double.valueOf(newResponse); is where the error is occurring.
*ERROR: Exception in thread "main" java.lang.NumberFormatException: For input string: "abc"
at sun.misc.FloatingDecimal.readJavaFormatString(Floa tingDecimal.java:1241) at java.lang.Double.valueOf(Double.java:504) at program13strings.Program13Strings.main(Program13St rings.java:21)
I am new to programming, but am working on a program that takes 6 inputted grade averages on a scale of 0.0 - 100.0 (exceptions in the case someone has exceeded the traditional 100.0 limit) and then divides it by 6 and returns the value in a dialog box. However, I want to take the values inputted and convert them to a 4.0 scale (90.0-100.0 = 4.0, 80.0-89.99 = 3.0, etc.) and then get the average of that so that I can return an average on a 4.0 scale. I have been trying to accomplish. Also, as of right now my program only prompts the user for 6 inputs, but I'd like the user to be able to input as many as he/she would like to, I am pasting the code I currently have below.
import javax.swing.JOptionPane; public class GPA_Calculation1_0 { public static void main(String[] args) { String courseOne = JOptionPane.showInputDialog("Enter numeric GPA of Course One: ");//Course one double numOne = Double.parseDouble(courseOne);
I am trying to make a program that calculates the change due in dollars and cents. The user inputs both the amount due and the amount tendered. My program only works with whole numbers?
I am making a simple text based game and i have a monster, and I am tring to make its health go down whent he user input "s" but istead it doesnt change and the users health even goes up.
Main.java
package exodus.game.main; import java.util.Scanner; import exodus.game.monsters.Nirav; public class Main { static String name; static String inputtemp;
I have started learning Java and have some across some difficulties. I'm trying to subtract two strings.
for example, with these strings;"032"&&"100". I want to be able to subtract each number individually so that the answer would be "032". 0-1;3-0;2-0;. if i get a negative number, the number would be zero. hence, the 0-1 staying zero in the answer.
I have tried using substring, and parsing the two values to ints, but don't know what to do next. I have also tries using a for loop, to go through each arrays of the strings. I am not allowed to use StringBuilder and I need to return "032".
I have the following program. In a nutshell, I creates an array of 3 consecutive ints and the user has to guess what those numbers are, knowing that they are between 0 and 7, this is from Head First Java. In the book, the code has a bug that is made on purpose and they challenge you to fix it. As you can see bellow, every time a user's guess matches a int in the array, the NumOfHits is increased by one. When the NumOfHits is 3 (the length of the array) the game finishes.
The bug is that if you guess 1 and 1 is in the array, if you type in 1, 3 times, I will increase the NumOfHits 3 times and end the game as if you had won. To solve the bug, you need to find a way to tell the program that if the user already guessed that number, it should no longer be taken into account and we shouldn't increase the NumOfHits if the same number is provided.
I "fixed" this by searching for the index of the number that matches an int of the array, and changing that index's value to 100, since the user knows that the numbers are between 0 and 7, they will not submit 100.
The result? If the user submits 2 and 2 is in the array, the value of its indexed is replaced by 100, so that if the user submits 2 again it doesn't count as a match.
Please see the comments in the code
import java.io.*; import java.util.Arrays;
class DotCom{ int NumOfHits = 0; int[] LocationCells; public void setLocationCells(int[] locs){ LocationCells = locs;
[Code] .....
The code works, but for some reason, some times I get a ArrayIndexOutOfBoundsException run time error and it appears to be somehow random. This is what I saw on the command line earlier
C:Userspablo.alvarez>java launchDotCom
Enter a number: 3 missed Enter a number: 4 hit Enter a number: 5 hit Enter a number: 7 missed Enter a number: 5 missed Enter a number: 4 missed Enter a number: 3 missed Enter a number: 4 missed Enter a number: 5 missed Enter a number: 6
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1 at DotCom.checkYourSelf(launchDotCom.java:16) at DotComGame.startGame(launchDotCom.java:59) at launchDotCom.main(launchDotCom.java:72)
As you can see here, 3 returned 'missed' but 4 and 5 returned hit. Since the numbers are in sequence and are only 3, it makes sense that the last number is 6 (4,5,6). You will then notice that when I submitted 3 and 4 again it returned 'missed' as expected, because the numbers were already matched earlier, but then when I submitted 6, it returned the error seen above.
Sometimes this doesn't happen at all, sometimes it happens at the 2nd guess or third, it appears to be somehow random. I'm familiar with the error message, but I don't see where I'm using an index that doesn't exist in the array. The only time I'm referencing an array index is on
LocationCells[index] = 100;
but the index variable will only hold a value if the int submitted by the user matches on of the values in one of the indexes, so how is it that I'm going over the number of available indexes?
import java.util.Scanner; public class Practice { public static void main(String[] args) { //get user input Scanner user_input = new Scanner(System.in); System.out.print("Enter a number: " );
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;
