Allow User To Enter Roman Numeral And Then Outputs Integer Number Value - While Loop
Feb 7, 2015
Write a program called RomanNumeralHelper that allows a user to enter a roman numeral and then outputs the integer number value. Use a Scanner to accept command line input from the user and continually ask for a roman numeral until the user enters Q (or q) to stop. Your solution should NOT use a switch statement.
Here is sample input / output:
Enter a roman numeral [Q | q to quit]: III
>> 3
Enter a roman numeral [Q | q to quit]: IV
>> 4
Enter a roman numeral [Q | q to quit]: V
>> 5
Enter a roman numeral [Q | q to quit]: Q
Good Bye!
This is what I have so far in my code, but I cant get what the user inputs when I want it to output the number.
import java.util.Scanner;
public class RomanNumber4
{
public static void main(String[] args) {
// obtain input from command window
Scanner input = new Scanner(System.in);
I am trying to write a program that asks the user to enter a number from 1 through 10 and then the program will display the roman numeral for that number.
I am also adding a error message in which i haven't yet because im still trying to figure out how to the program will do the roman numeral.'
I have used the if and else if. but when i input a number it just repeats the number back to me.
The program cimpiles but it doesn't do what i want. here is what i have so far. how can i get the program to display the roman numeral after the number is entered.
import javax.swing.JOptionPane; public class Romannumeral { public static void main(String[] args) { double number;
Goal is to: Write a program that prompts the user to input an integer and then outputs both the individual digits of the number and the sum of the digits.
First I don't know where I made mistakes here, and the only error it finds right now is that str2 was not initialized and I cannot figure out where/when to initialize it.
import javax.swing.JOptionPane; public class DigitsAndSum { public static void main (String[] args) { String str1; String str2; int int1 = 0; int int2 = 0;
I am trying to get a user to enter an integer (registration number) between 500 and 5000. if it is below 500 and over 5000 the user should get a prompt "invalid number" and "non-numeric character". See my code below. it is not working when i enter invalid numbers.
import java.util.*; public class Infomation{ public static void main(String args []) { Scanner in = new Scanner(System.in); System.out.print("Student Number:"); int sn=in.nextInt();
I have made a program that is supposed to convert roman numerals to decimals. It is NOT supposed to convert decimals to roman numerals. The only problem it seems there is with the program is that it only adds and does NOT subtract. This causes some roman numeral conversions to be flawed. What can I try to fix this. Keep in mind that the reason some methods exist is because the directions for the code say that I have to make it this way.
Instructions:
Write a program that converts a number entered in Roman numerals to decimal. Your program should consist of a class called Roman. An object of type Roman should be able to do the following:
1) Store the number as a Roman numeral. 2) Convert and store the number into decimal. 3) Print the number as a Roman numeral or decimal number as requested by the user. (Be sure to over-ride the toString function). 4) Your class must contain the method romanToDecimal to convert a Roman numeral into its equivalent decimal number. 5) Test your program using the following Roman numerals: MCXIV, CCCLIX, and MDCLXVI.
This is what I have so far. It compiles and there are no errors, but it does not subtract I from X, or I from V and so on. For example,CMXLVII should be 947, but the program outputs 1067.
import javax.swing.*; import java.util.*; public class Roman{ private String roman; private int decimal; public int romanToDecimal(String s)
I got part of this converter built and running fine but now it's getting weird. Specifically I am getting to the part where I have to count above ten which means things like attaching Vs to Is and Xs and suchlike.
I know I have to use an .append someplace, I am just not certain how to go about it. I've been playing with it some, but this is honestly the biggest thing I've built so far that actually *ran* so I'm afraid to poke too many holes in it... where do I start? It's not like I can invent another return string and concatenate them. R is what I've got.
package hello; public class RomansatHomans { public static void main(String[] args) { // input fed on this line loops through toRo and comes back as a String // R String R = toRo(23); // int D = froRo("x");
The exercise sounds like this : Write a program that prompts the user to enter an integer from 1 to 15 and displays a pyramid , as shown in the following sample run (my code displays correctly the first 9 lines):
The problem is when i input a number greater then 9 as it requires 2 spaces . I m pritty sure i solved it incorrectly or at lost not optimal as i m using a string that decreases on each line to create the pyramid effect.
import java.util.*; public class C5_17 { public static void main(String[] args){ Scanner input = new Scanner(System.in); System.out.println("Enter the number of lines: ");
package question.pkg3; import java.util.Scanner; public class Question3 { public static void main(String[] args) { // TODO code application logic here Scanner Luka=new Scanner(System.in); double sum=0;double count=0; int[] a=new int[10];
[code]....
I'm required to write a program that allows the user to enter up to 10 integer grades into an array. Stop the loop by typing in ‐1. Your main method should call an Average method that returns the average of the grades.I There's something wrong with my program , the count always stays 0 and the sum is always 1 less than the actual sum.Sample input and output :
Enter grade 1: 8 Enter grade 2: 9 Enter grade 3: 10 Enter grade 4: 5 Enter grade 5: 8 Enter grade 6: 9 Enter grade 7: -1 output
Average grade is 8.1666666667On line 13 I had count=count+1 ;
So I am currently writing my first assignment and have run into problems with my coding. The task was to have someone enter a 5 digit number and in return, I list each number on their respective lines. We also must create an error if a number other than 5 digits was entered. My problem is that when they enter a 1 or 2,3,4,6,7,8 digit number.. the error message occurs along with the rest of the messages (listing the numbers, etc). I want the program to end (or even re-ask to enter the numbers) if they incorrectly enter the data.
so I had to create a program that allows the user to enter a day using a number and then enter a year and after they did that it would create an entire calendar for that year ..so I have that but the only issue is I can not get the numbers to line up neatly.how to do the entire thing in loops, I tried a couple in here..what this would look like as loops instead of switches and cases and if else
import java.util.Scanner; public class Calendar { public static void main(String[] args) { Scanner scanner = new Scanner(System.in);
1. Write a Java program that randomly generates a five-digit lottery number and prompts the user to enter a five-digit number. Each digit in the number is in the range between 0~9. The program should determine which prize the user wins according to the following rule:
- The user wins the first prize if the user input matches all five digits in the lottery number in exact order. -The user wins the second prize if the user input matches any four digits in the lottery number in exact positions. -The user wins the third prize if the user input matches any three digits in the lottery number in its exact position. -The user wins the fourth prize if the user input matches any two digits in the lottery number in its exact position.
- The user wins the fifth prize if the user input matches any one digit in the lottery number in its exact position.here is my code. I have tried replacing the && statements with || and it always returns either case 1 or case default.
import java.util.Scanner; import java.util.Random; class Hw5 { static int getPrize(int g1, int g2, int g3, int g4, int g5, int u1, int u2, int u3, int u4, int u5) {
Write a program called ProductCatalog that prompts the user to enter the number of products in the product catalog. The program should then prompt the user for the name and the price of each product in the product catalog. Once all of the products have been entered, the program should output the product information (name and price) of the most expensive product in the catalog. Your solution must use a for loop repetition structure and should use the Product class included in labfiles05.zip to keep track of the product with the highest price. Here is sample output:
Enter the number of products: 3 Enter the name of product 1: iPod Enter the price of product 1: 158.99Enter the name of product 2: iPad Enter the price of product 2: 518.99 Enter the name of product 3: iPadMini Enter the price of product 3: 304.49 Most Expensive: Product [name=iPad, price=518.99]
Your solution should not use an array to keep track of all the product information entered.
I am having trouble with my code, with the For loop and then calling the methods from the Product class into the ProductCatalog. How should I approach this program.
Here is the Product program.
public class Product { private String name; private double price; public Product(String theName, double thePrice) { name = theName; price = thePrice;
[Code]...
Here is the ProductCatalog class where I call the methods from Product class. The For loop is what I am having trouble with as well.
import java.util.Scanner; public class ProductCatalog { public static void main(String[] args) { double number; String product = " "; double productCount = 0;
So I have this program where i have to prompt user to enter a the value of their savings for n number of weeks (quarters dimes nickels pennies) and the program outputs the total of savings an average of saving per week and an estimation of saving per year.
I managed to do the first step but the problem is that when they enter the value of their savings i don't know how to save the value of each(quarters dimes nickels and pennies) to make the calculations? Here is what i have so far
import java.util.Scanner; public class yearlySavings { public static void main(String[] args) { Scanner kb = new Scanner(System.in); int numberOfWeeks = 0; // initialize value of numberOfWeeks
I am starting a program that is dealing with arrays. My issue, allowing a user to enter 'x' number of people into an array. How do I first allow them to enter the size of an array, and then enter strings (list) into that array. In addition to this, I need to specify the number of boxes of cookies sold by each person and keep a tally of the number of people selling cookies in each category (e.g. 1-10, 11-20...etc). Instead of having a number 100000, I want the user to enter that size, 'x'.
import java.util.Scanner; public class cookie { public static void main(String[] args) { Scanner input = new Scanner(System.in); int x = 100; double saleCount[] = new double [x]; String[] girlScout = new String[100000];
Ok so I have my program working for the most part. In this program I am supposed to take input from the user until they enter a negative number and that works, the problem is that it doesn't work if I enter a negative number on the first prompt. For example if I enter a 100 it would prompt me again and if I enter a negative number it would quit and give me the average, but if I enter a negative number the first time I am prompted the program just gives me an error. How do I fix that?
import java.util.List; import java.util.ArrayList; import java.util.Scanner; public class Application { public static void main(String [] args){ Scanner input = new Scanner(System.in); List<Integer> grades;
Here is my program. I have to add the outputs from variable 'done' together. It seems to not work inside or outside the loop.
//A program that will find the last/check digit of a Book ISBN number.
import java.util.*; public class ISBN { public static void main(String[] args) { Scanner kb = new Scanner(System.in); System.out.println("Enter the ISBN number>"); String isbn = kb.nextLine(); //Even though the ISBN code is a number,
Write a program that prompts the user to input an integer and then outputs both the individual digits of the number and the sum of the digits.
Now I have a code for spacing out the integers, and I have a separate code for adding the digits. But I am not sure how to merge them together. Both of them work independently
Spacing code: import java.util.*; public class SumoftheIntegers { static Scanner console=new Scanner(System.in); public static void main(String []args) { int num1, test, rem; int counter = 0;
[Code]...
Now the sum of the integers code:
import java.util.Scanner; public class sum { public static void main(String[] args) { // Create a Scanner Scanner input = new Scanner(System.in); // Enter amount System.out.print("Enter an integer: "); int integer = input.nextInt();
(A) Restrict the number of output values per line to 3 numbers, (B) Remove Duplicate lines, where the same numbers are duplicated just outputted in a different order. (C) Count the number of outlines (D) Add a fixed column to the outputs that has an ascending count from 1 upwards
I'm trying to achieve. The code is as follows:
package num.com.t1; import java.util.*; import java.util.concurrent.atomic.AtomicInteger; /** * * */ public class NumComT1 { public static void main(String... args) {
I'm trying to learn Java and my current project is to write a short program to determine the factorial of a number entered by the user. I haven't looked. There may be a method that will do it, but I want to use a for loop specifically.
What I have compiles just fine. I'm actually pretty thrilled just with that. Here is what I have:
class factorial { public static void main( String[] args) { Scanner scan = new Scanner(System.in ); int num; int product = 1;
I've been working on a question using parallel arrays where the user inputs an integer 1-12 and the output will be the name of the month and the number of days in that month. This is what I have so far
import java.util.*; public class DaysMonth { public static void main (String args[]) { Scanner keyIn = new Scanner(System.in); int[] days = new int[]{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
