We Keep Coding

How to continue with the value you got in the first variable not start again

import java.util.Scanner;
public class MoneyChange {
public static void main(String[] args) {
Scanner reader = new Scanner(System.in);
System.out.print("Input an amount of money: ");
double value = reader.nextDouble();
int money = (int) value;
int thousand = money / 1000;
int fivehundred = money / 500;
int hundred = money / 100;
int fifty = (money % 100) / 50;
int twenty = ((money % 100) % 50) / 20;
int ten = (((money % 100) % 50) % 20) / 10;
int five = ((((money % 100) % 50) % 20) % 10) / 5;
int one = (((((money % 100) % 50) % 20) % 10) % 5) / 1;
System.out.println("Number of 1000-Bhat Banknote(s) is " + thousand);
System.out.println("Number of 500-Bhat Banknote(s) is " + fivehundred);
System.out.println("Number of 100-Bhat Banknote(s) is " + hundred);
System.out.println("Number of 50-Bhat Banknote(s) is " + fifty);
System.out.println("Number of 20-Bhat Banknote(s) is " + twenty);
System.out.println("Number of 10-Bhat Coin(s) is " + ten);
System.out.println("Number of 5-Bhat Coin(s) is " + five);
System.out.println("Number of 1-Bhat Coin(s) is " + one);
reader.close();
}
}
I would like to know how to continue the values from the first variable onto the other and not start again. Help me out!

In this code
int fifty = (money % 100) / 50;
you can calculate money % 100 and store it in a variable you can re-use it
int hun = money % 100;
int fifty = (hun) / 50;
Also be aware of Integer division

please do small modifications in your program.please take the look below code once.
public static void main(String[] args) {
Scanner reader = new Scanner(System.in);
System.out.print("Input an amount of money: ");
double value = reader.nextDouble();
int money = (int) value;
int thousand = money / 1000;
int remain = money % 1000 ;
int fivehundred = remain / 500;
remain = remain % 500;
int hundred = remain / 100;
remain = remain % 100;
int fifty = remain / 50;
remain = remain % 50;
int twenty = remain / 20;
remain = remain % 20;
int ten = remain / 10;
remain = remain % 10;
int five = remain / 5;
remain = remain % 5;
int one = remain / 1;
System.out.println("Number of 1000-Bhat Banknote(s) is " + thousand);
System.out.println("Number of 500-Bhat Banknote(s) is " + fivehundred);
System.out.println("Number of 100-Bhat Banknote(s) is " + hundred);
System.out.println("Number of 50-Bhat Banknote(s) is " + fifty);
System.out.println("Number of 20-Bhat Banknote(s) is " + twenty);
System.out.println("Number of 10-Bhat Coin(s) is " + ten);
System.out.println("Number of 5-Bhat Coin(s) is " + five);
System.out.println("Number of 1-Bhat Coin(s) is " + one);
reader.close();
}

Weka Evaluation Arguments 0/1

May I know what is the argument need to sset in ()? 0 or 1? My datasets have three classes.
System.out.println("False Negative % = " + eval.falseNegativeRate(1));
System.out.println("True Negative % = " + eval.trueNegativeRate(1));
System.out.println("True Positive % = " + eval.truePositiveRate(1));
System.out.println("Accuracy % = " + accuracy);
System.out.println("Precision % = " + eval.precision(1));
System.out.println("Recall % = " + eval.recall(1));
System.out.println("F-Measure % = " + eval.fMeasure(1));
System.out.println("Error rate % = " + eval.errorRate());

In java, how do I make the while loop run until the condition is satisfied multiple times?

I am trying to make a program where the user can input the target as well as the amount of times he wants to hit the target. The problem is that I dont know how to make the while loop run more than once (satisfy the condition more than one time).
Scanner target = new Scanner(System.in);
System.out.println("Enter dice target (1-10):");
int targetNumber = target.nextInt();
Scanner required = new Scanner(System.in);
System.out.println("Enter the number of required matches: ");
int requiredMatches = target.nextInt();
int number = (int) (1 + 10 * Math.random());
int sum = 1;
if (targetNumber > 10) {
System.out.println("Error");
}
else {
while (number != targetNumber) {
System.out.println("Your number is " + number);
number = (int) (1 + 10 * Math.random());
++sum;
}
System.out.println("You reached your target " + requiredMatches + " times in " + sum + " tries.");
}
The code lets me match the target only once, but I want it to be able to obtain the target value [RequiredMatches] times before it stops.

If the number matches, then reduce the tries by 1.
Scanner Required = new Scanner(System.in);
System.out.println("Enter the number of required matches: ");
int RequiredMatches = Target.nextInt();
int Number = (int) (1 + 10 * Math.random());
int sum = 1;
if (NumberTarget > 10) {
System.out.println("Error");
} else {
while ((Number != NumberTarget) || (RequiredMatches > 0)) {
System.out.println("Your number is " + Number);
Number = (int) (1 + 10 * Math.random());
++sum;
if (Number==NumberTarget) {
RequiredMatches--;
}
System.out.println("You reached your target " + RequiredMatches + " times in " + sum + " tries.");
}
}

How do I simulate 3000 dice rolls and count the number of times doubles are rolled? JAVA

I'm new to the programming world so I'd deeply appreciate if any of you could help me become better at this. My goal for this program is to simulate 3000 dice rolls and count the number of times doubles are rolled for each of the different possible pairs of doubles using a while loop. The results should be printed out in a dialog box.
Random random;
random = new Random();
diceRolls = 1;
snakeEyes = 1;
doubleTwos = 1;
doubleThrees = 1;
doubleFours = 1;
doubleFives = 1;
doubleSixes = 1;
while (diceRolls <= finalDiceRoll) {
int diceRolls = 1;
int die1 = random.nextInt(6) + 1;
int die2 = random.nextInt(6) + 1;
if (die1 == 1 && die2 == 1){
//snakeEyes = snakeEyes + 1;
snakeEyes++;
}
else if (die1 == 2 && die2 == 2 ) {
doubleTwos++;
}
else if (die1 == 3 && die2 == 3) {
doubleThrees++;
}
else if (die1 == 4 && die2 == 4) {
doubleFours++;
}
else if (die1 == 5 && die2 == 5) {
doubleFives++;
}
else if (die1 == 6 && die2 == 6) {
doubleSixes++;
}
JOptionPane.showMessageDialog (null, "You rolled snake eyes " + snakeEyes + " times\nYou rolled double twos " + doubleTwos + " times\nYou"
+ " rolled double threes " + doubleThrees + " times\nYou rolled double fours " + doubleFours + " times\nYou"
+ " rolled double fives " + doubleFives + " times\nYou rolled double sixes " + doubleSixes + " times");
}
The issue i'm having here is that the results i'm getting from the program don't seem "plausible". For example, out of 3000 dice rolls, I get 1 pair of each double. What am I doing wrong?

Few changes you have to make in your code,
1. Initialize all your variables by 0.
2. change while-loop condition to
while (diceRolls <= finalDiceRoll) // hoping that finalDiceRoll = 3000
3 remove int diceRolls = 1; from while-loop and add diceRolls++; at end of while-loop.
4. Put your JOptionPane outside while-loop. if not you have to close 3000 time your JOptionPane dailog.
After applying these changes to your code you will learn what have you done wrong and your code will run fine.

Move the showMessageDialog outside of the while loop and increment the diceRolls variable. Initialize all other integer variables with 0.
A better (cleaner and shorter) approach would be to use a two-dimensional array or a map.
Random random = new Random();
int snakeEyes = 0;
int doubleTwos = 0;
int doubleThrees = 0;
int doubleFours = 0;
int doubleFives = 0;
int doubleSixes = 0;
int diceRolls = 1;
while (diceRolls <= 3000) {
int die1 = random.nextInt(6) + 1;
int die2 = random.nextInt(6) + 1;
if (die1 == 1 && die2 == 1) {
snakeEyes++;
} else if (die1 == 2 && die2 == 2) {
doubleTwos++;
} else if (die1 == 3 && die2 == 3) {
doubleThrees++;
} else if (die1 == 4 && die2 == 4) {
doubleFours++;
} else if (die1 == 5 && die2 == 5) {
doubleFives++;
} else if (die1 == 6 && die2 == 6) {
doubleSixes++;
}
diceRolls++;
}
JOptionPane.showMessageDialog(null, "You rolled snake eyes " + snakeEyes + " times\nYou rolled double twos " + doubleTwos + " times\nYou"
+ " rolled double threes " + doubleThrees + " times\nYou rolled double fours " + doubleFours + " times\nYou"
+ " rolled double fives " + doubleFives + " times\nYou rolled double sixes " + doubleSixes + " times");
The above-mentioned shorter version:
Random random = new Random();
int[] doubled = new int[6];
for (int diceRolls = 0; diceRolls < 3000; diceRolls++) {
int die1 = random.nextInt(6);
int die2 = random.nextInt(6);
if (die1 == die2)
doubled[die1]++;
}
JOptionPane.showMessageDialog(null, "You rolled snake eyes " + doubled[0] + " times\nYou rolled double twos " + doubled[1] + " times\nYou"
+ " rolled double threes " + doubled[2] + " times\nYou rolled double fours " + doubled[3] + " times\nYou"
+ " rolled double fives " + doubled[4] + " times\nYou rolled double sixes " + doubled[5] + " times");

The counting logic should go as follows:
doubleTwos = 0;
doubleThrees = 0;
doubleFours = 0;
doubleFives = 0;
doubleSixes = 0;
finalDiceRoll = 3000;
int diceRolls = 0;
while (diceRolls < finalDiceRoll) {
++diceRolls;
With any message after the loop.
With an array you may save typing:
int[] doubleCounts = new int[6]; // By 0 based dice values
for (int i = 0; i < finalDiceRoll; ++i) {
int die1 = random.nextInt(6); // With dice values 0-5
int die2 = random.nextInt(6);
if (die1 == die2) {
++doubleCounts[die1];
}
}
int snakeEyes = doubleCounts[0];
int doubleTwos = doubleCounts[1];
...

Simplify. Eliminate duplications. Don't use multiple variables when you can use an array.
int[] doubles = new int[7]; // make the index the number rolled (ignore index 0)
int diceRolls = 0;
while (diceRolls++ < 3000) {
int die1 = random.nextInt(6) + 1;
int die2 = random.nextInt(6) + 1;
if (die1 == die2)
doubles[die1]++;
}
String output = "";
for (int i = 1; i <= 6; i++)
output += "You rolled double " + i + "'s " + doubles[i] + " times\n";
JOptionPane.showMessageDialog (null, output);
That's all you need.

Tidying code and fixing errors (java)

I need to modify the code so that,
its structure is better
it is more readable
it uses methods and parameters
only one statement needs to be changed if a different number of integers is to be input
My new code is at the bottom but it's not working yet, can't quite figure out what else I need to do to it. If anyone could help that would be fab.
Original Code
import java.util.Scanner;
public class MakeMeBetter
{
public static void main(String[] args)
{
int[] a = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
Scanner b = new Scanner(System.in);
System.out.println("Please input 10 numbers in the range 1-19 :> ");
int c = b.nextInt();
while (c < 1 || c > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[0] = c;
int d = b.nextInt();
while (d < 1 || d > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[1] = d;
int e = b.nextInt();
while (e < 1 || e > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[2] = e;
int f = b.nextInt();
while (f < 1 || f > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[3] = f;
int g = b.nextInt();
while (g < 1 || g > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[4] = g;
int h = b.nextInt();
while (h < 1 || h > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[5] = h;
int i = b.nextInt();
while (i < 1 || i > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[6] = i;
int j = b.nextInt();
while (j < 1 || j > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[7] = j;
int k = b.nextInt();
while (k < 1 || k > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[8] = k;
int l = b.nextInt();
while (l < 1 || l > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
}
a[9] = l;
System.out.println("\nArray contents");
System.out.print((a[0] < 10 ? " " : "") + a[0] + " ");
System.out.print((a[1] < 10 ? " " : "") + a[1] + " ");
System.out.print((a[2] < 10 ? " " : "") + a[2] + " ");
System.out.print((a[3] < 10 ? " " : "") + a[3] + " ");
System.out.print((a[4] < 10 ? " " : "") + a[4] + " ");
System.out.print((a[5] < 10 ? " " : "") + a[5] + " ");
System.out.print((a[6] < 10 ? " " : "") + a[6] + " ");
System.out.print((a[7] < 10 ? " " : "") + a[7] + " ");
System.out.print((a[8] < 10 ? " " : "") + a[8] + " ");
System.out.print((a[9] < 10 ? " " : "") + a[9] + " ");
System.out.println();
boolean noSwap = false;
int startAt = 0;
int stopAt = 9;
while (startAt < stopAt && noSwap == false)
{
noSwap = true;
for (int m=startAt; m<stopAt; m++)
{
if (a[m] > a[m+1])
{
int t = a[m];
a[m] = a[m+1];
a[m+1] = t;
noSwap = false;
}
}
stopAt = stopAt - 1;
}
System.out.println("\nArray contents");
System.out.print((a[0] < 10 ? " " : "") + a[0] + " ");
System.out.print((a[1] < 10 ? " " : "") + a[1] + " ");
System.out.print((a[2] < 10 ? " " : "") + a[2] + " ");
System.out.print((a[3] < 10 ? " " : "") + a[3] + " ");
System.out.print((a[4] < 10 ? " " : "") + a[4] + " ");
System.out.print((a[5] < 10 ? " " : "") + a[5] + " ");
System.out.print((a[6] < 10 ? " " : "") + a[6] + " ");
System.out.print((a[7] < 10 ? " " : "") + a[7] + " ");
System.out.print((a[8] < 10 ? " " : "") + a[8] + " ");
System.out.print((a[9] < 10 ? " " : "") + a[9] + " ");
System.out.println();
double n = (a[0] + a[1] + a[2] + a[3] +
a[4] + a[5] + a[6] + a[7] +
a[8] + a[9]) / 10;
System.out.println("The minimum number is: " + a[0]);
System.out.println("The maximum number is: " + a[9]);
System.out.println("The average value is: " + n);
System.out.println("The median is: " + a[4]);
}
}
New Code
import java.util.Scanner;
import java.math.*;
public class MakeMeBetterImproved {
public static void main(String[] args) {
Scanner kybd = new Scanner(System.in);
int[] numbers = new int[10];
int array = 0;
System.out.println("Enter 10 integers: ");
for (int i = 0; i < numbers.length; i++) {
numbers[i] = kybd.nextInt();
int MyIntArray = array + i;
}
System.out.println("The minimum number is: " + math.min);
System.out.println("The maximum number is: " + math.max);
System.out.println("The average value is: " + math.average);
System.out.println("The median is: " + math.median);
}
}

Consider using a more dynamic structure than a primitive array.
I like ArrayLists: http://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html
Reorganize your long code into while or for loops.
An example:
ArrayList<Integer> a = new ArrayList<Integer>();
Scanner b = new Scanner(System.in);
Integer c = null;
while (a.size() != 10) {
System.out.println("Please input a number in the range 1-19 :> ");
c = b.nextInt();
while (c < 1 || c > 19)
{
System.out.println("Not in the range 1-19, please try again :> ");
c = b.nextInt();
}
a.add(c);
}
System.out.println("\nArray contents");
for (int i=0; i<10; i++) {
System.out.print((a.get(i) < 10 ? " " : "") + a.get(i) + " ");
}
(And so on...)

Could you try this? I made a few changes.
package p2;
import java.util.Arrays;
import java.util.Scanner;
public class TicTacToe {
public static void main(String[] args) {
Scanner kybd = new Scanner(System.in);
int[] numbers = new int[10];
int sum = 0;
System.out.println("Enter 10 integers: ");
for (int i = 0; i < numbers.length; i++) {
numbers[i] = kybd.nextInt();
sum += numbers[i];
}
Arrays.sort(numbers);
System.out.println("The minimum number is: " + numbers[0]);
System.out.println("The maximum number is: " + numbers[9]);
System.out.println("The average value is: " + sum / numbers.length);
System.out.println("The median is: " + median(numbers));
}
public static double median(int[] m) {
int middle = m.length / 2;
if (m.length % 2 == 1) {
return m[middle];
} else {
return (m[middle - 1] + m[middle]) / 2.0;
}
}
}