I've been getting frustrated because my input is being skipped by the program for some reason. This causes the while loop to be skipped and the program to stop.
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
Random random = new Random();
System.out.println("Guess a number between 1 and 10.");
int count = 1;
int guess = input.nextInt();
int answer = random.nextInt(1) + 1;
while(guess != answer)
{
System.out.println("Wrong answer. Try again.");
guess = input.nextInt();
count++;
}
System.out.println("\nIt took " + count + " guesses to guess " + answer + ".");
System.out.println("\nWould you like to play again (Y/N)?");
String decision = input.nextLine(); // The program skips this input
decision = decision.toUpperCase();
while(decision.equals("Y"))
{
System.out.println("Guess a number between 1 and 10.");
count = 1;
guess = input.nextInt();
answer = random.nextInt(1) + 1;
while(guess != answer)
{
System.out.println("Wrong answer. Try again.");
guess = input.nextInt();
count++;
}
System.out.println("\nIt took " + count + " guesses to guess " + answer + ".");
System.out.println("\nWould you like to play again (Y/N)?");
decision = input.nextLine();
decision = decision.toUpperCase();
}
System.out.println("Thanks for playing.");
}
Related
Im trying to get the output for the number of times the loop was ran over, decided by the user. Im using while() but I'm not sure how to output the number of loops once the loop is over.
Here's my code:
public class RockPaperScissors {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Choose a number between 2 and 10, choose 1 to end it");
int number1 = input.nextInt();
System.out.println("You Chose Number " + number1);
while (number1 != 1) {
System.out.println("Choose a number between 2 and 10, choose 1 to end it");
number1 = input.nextInt();
System.out.println("You Chose Number " + number1);
}
System.out.println("Thank you for choosing. Goodbye");
}
}
please help me thank you !!
You just need an additional variable that increments each time the loop occurs. Then after the loop you can use that variable to show the number of times looped.
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Choose a number between 2 and 10, choose 1 to end it");
int number1 = input.nextInt();
int loopcount = 0;
System.out.println("You Chose Number " + number1);
while (number1 != 1){
System.out.println("Choose a number between 2 and 10, choose 1 to end it");
number1 = input.nextInt();
loopcount += 1;
System.out.println("You Chose Number " + number1);
}
System.out.println("Thank you for choosing. Goodbye");
System.out.println("Looped " + loopcount + " times";
}
By the way, you could also optimise the function by eliminating the input request before the "while()" loop. It's repeated, redundant code that doesn't need to be there.
For example:
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int number1 = 0;
int loopcount = -1;
while (number1 != 1) {
System.out.println("Choose a number between 2 and 10, choose 1 to end it");
number1 = input.nextInt();
loopcount += 1;
System.out.println("You Chose Number " + number1);
}
System.out.println("Thank you for choosing. Goodbye");
System.out.println("Looped " + loopcount + " times";
}
If there is only requirement to count the looping then taking an int variable is enough, but if you want to keep records the chosen number then take a List which can store the chosen numbers dynamically and its length would be the looping count.
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int choice = 0;
int count=0;
List<Integer> numbers = new ArrayList(); // if chosen num is needed
do{
System.out.print("Choose a number between 2 and 10, choose 1 to end it :");
choice = scanner.nextInt();
if(choice !=1 ) {
count++;
numbers.add(choice); // if chosen num is needed
}
}while (choice != 1);
System.out.println("Loop counts " + count);
System.out.println("Loop counts " + numbers.size() + " times and numbers are "+numbers);
}
I am writing a program that will ask the user to guess a random number 6 times. The program has to ask if they want to play again and will keep a running total of the wins/losses.
How would I have the program rerun?
heres the code:
import java.util.Scanner;
import java.util.Random;
public class Project {
public static void main(String[] args) {
String input;
double guess = 0;
int number;
double wins = 0;
double losses = 0;
String repeat;
Scanner keyboard = new Scanner(System.in);
Random randomNumbers = new Random();
System.out.println("Welcome to Higher/Lower!");
System.out.println("Enter your name: ");
input = keyboard.nextLine();
while(input.equalsIgnoreCase("yes")); {
number = randomNumbers.nextInt(100) + 1;
System.out.println("I've chosen my number, " + input + "You only have 6 tries, good luck!"); }
for(int num = 1; number != guess && number <= 6; num++) {
System.out.println("Enter guess " + num + ":");
guess = keyboard.nextDouble();
if(guess < number)
System.out.println("higher.");
else if(guess > number)
System.out.println("lower.");
else
System.out.println("Congratulations!"); }
if(guess == number) {
System.out.println("You guesses my number!"); wins++; }
if(guess != number) {
System.out.println("Sorry, " + input + " my number was " + number +
"You lose!"); losses++; }
System.out.println("Do you want to play again? (Yes/No): ");
repeat = keyboard.nextLine();
if(input.equalsIgnoreCase("no")); {
System.out.println("Thanks for playing!"); }
System.out.println(wins + " wins");
System.out.println(losses + " losses");
}
}
It is skipping over asking me if i want to play again or not and i dont know what kind of loop to use
Wihtout your code, I'm assuming this is what you need.
boolean doContinue = true;
do {
//guess random number 6 times
//do you want to continue?
// yes -> doContinue = true;
// no -> doContinue = false;
} while (doContinue );
I would suggest making your loop a do-while loop like this:
do {
for (int i=0; i<6; i++){
/*
insert code for the guessing/checking/etc.
*/
}
System.out.print("Would you like to continue? [Y/n] ");
} while (scan.next().toUpperCase().charAt(0) != 'Y');
So I am more or less completely done with this code that runs a guessing game. At the end it prints the total results for all games played. This includes total games, total guesses, avg guesses/game and the best score. I have it all worked out except i need the avg guesses/game to show 1 decimal place but the System.out.printf("Guesses/game = %.1f") isn't working and idk why
import java.util.*; //so I can use scanner
public class GuessingGame {
public static void main(String[] args) {
Random rand = new Random ();
int max = 100;
Scanner input = new Scanner(System.in);
int guess;
boolean play = true;
int totalGames = 0;
int totalGuesses = 0;
int bestGame = Integer.MAX_VALUE;
System.out.println("Can you guess the word?");
System.out.println("I am sure you cannot guess!");
System.out.println("Go ahead and try!");
System.out.println();
while (play) { //repeats until user enters a statement besides y when asked to play again
System.out.println("I'm thinking of a number between 1 and " + max + "...");
int numberToGuess = rand.nextInt(max) + 1;
int numberOfTries = 0;
boolean win = false;
while (!win) {
System.out.print("Your guess? ");
guess = input.nextInt();
numberOfTries++;
if (guess == numberToGuess) {
win = true;
} else if (guess > numberToGuess) {
System.out.println("It's lower.");
} else if (guess < numberToGuess) {
System.out.println("It's higher.");
}
input.nextLine();
}
if (numberOfTries == 1) {
System.out.println("You got it right in " + numberOfTries + " guess!");
} else {
System.out.println("You got it right in " + numberOfTries + " guesses!");
}
totalGames++;
totalGuesses+= numberOfTries;
System.out.print("Do you want to play again? ");
String answer = input.nextLine();
char firstLetter = answer.charAt(0);
if (firstLetter == 'y' || firstLetter == 'Y') {
play = true;
} else {
play = false;
bestGame = Math.min(bestGame, numberOfTries);
}
System.out.println();
}
System.out.println("Overall results:");
System.out.println("Total games = " + totalGames);
System.out.println("Total guesses = " + totalGuesses);
System.out.printf("Guesses/game = ", totalGuesses/totalGames);
System.out.println("Best game = " + bestGame);
}
}
both totalGuesses and totalGames are integers, so when you divide them you get an integer, whereas %f needs a floating point number.
Instead cast one to a floating point number for floating point division:
totalGuesses/(double)totalGames
Try a decimal formatter if for some reason you're simply getting the wrong output:
DecimalFormat formatter = new DecimalFormat("#.#");
System.out.println(formatter.format(avgGuesses)); //or whatever your var name is
Im making a guessing game for my class and I need some help for adding a "play again" feature at the end of the game when you've guessed the right number:
public class GuessingGame
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
Random rand = new Random();
int numtoguesses = rand.nextInt(1000) + 1;
int counter = 0;
int guess = -1;
while (guess != numtoguesses)
{
System.out.print ("|" + numtoguesses + "|" + "Guess the right number: ");
guess = input.nextInt();
counter = counter + 1;
if (guess == numtoguesses)
System.out.println ("YOU WIN MOFO!");
else if (guess < numtoguesses)
System.out.println ("You're to cold!");
else if (guess > numtoguesses)
System.out.println ("You're to hot!");
}
System.out.println ("It took you " + counter + " guess(es) to get it correct");
}
}
One simple approach would be to move the code you've written into a function
public void play() {
...
}
and from main do something like:
do {
play();
playAgain = promptUser;
} while(playAgain);
Just put another while loop over everything.
boolean playing = true;
while(playing) {
while(guess != numtoguesses) { // All code }
System.out.println("Do you wish to play again? Y/N");
String answer = input.nextLine();
playing = answer.equalsIgnoreCase("y");
count = 0;
guess = -1;
}
Everything together:
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Random rand = new Random();
int numtoguesses = rand.nextInt(1000) + 1;
int counter = 0;
int guess = -1;
boolean playing = true;
while(playing) {
while (guess != numtoguesses) {
System.out.print ("|" + numtoguesses + "|" + "Guess the right number: ");
guess = input.nextInt();
counter = counter + 1;
if (guess == numtoguesses)
System.out.println ("YOU WIN MOFO!");
else if (guess < numtoguesses)
System.out.println ("You're to cold!");
else if (guess > numtoguesses)
System.out.println ("You're to hot!");
}
}
System.out.println ("It took you " + counter + " guess(es) to get it correct");
System.out.println("Do you wish to play again? Y/N");
String answer = input.nextLine();
playing = answer.equalsIgnoreCase("y");
count = 0;
guess = -1;
numtoguesses = rand.nextInt(1000) + 1;
}
You should extract this in a few methods, but I'll leave that up to you.
There are a lot of options I can think about. The quickest:
-- place all the code between lines int numtoguesses = rand.nextInt(1000) + 1; (inclusive) and end of main method inside an infinite loop
-- at the end of your current code block, add an interogation to the user, asking him whether he/she wants to play again (you can define a convention for the pressed keys); this part is placed also inside the infinite loop
-- if he/she doesn't want to, break the (outer) infinite loop
/hello, I am trying to learn how to use "break" commend in java as well as continuing loop with "y or n" choice. I am writing this game Guessing Number and I have some trouble with "y" choice. I will try to explain, to write a game of guessing number was easy so I started to add some conditions like the possibility on the and to play again or not, later I was thinking that would be more interesting if I add possibility to quit any time player wish, but that does not working correctly. Please help, thats my code
package guessinggame;
import java.util.Random;
import java.util.Scanner;
/**
*
public class Main {
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
System.out.println(" Welcome ");
Random rand = new Random();
Scanner input = new Scanner(System.in);
boolean play_again = true;
while (play_again)
{
int number_guess = rand.nextInt(100)+1;
int number_of_tries = 0;
int guess;
String another = "y";
boolean win = false;
while (win == false)
{
System.out.println(" Try too guess a number between 1 and 100 ");
guess = input.nextInt();
number_of_tries++;
if (guess == number_guess)
{
win = true;
}
else if (guess < number_guess)
{
System.out.println(" Guess is too low " + "\n Guess another number to continue or n to quit ");
if (input.hasNext("n"))
{
play_again = false;
break;
}
}
else if (guess > number_guess)
{
System.out.println(" Guess is too high " + "\n Guess another number to continue or n to quit ");
if (input.hasNext("n"))
{
play_again = false;
break;
}
}
}
System.out.println(" You Win!!! ");
System.out.println(" The number was " + number_guess);
System.out.println(" It took you " + number_of_tries + " tries " +
"\nWould you like to play again? (y/n): ");
if (another.equalsIgnoreCase("y") == true)
play_again = true;
else
{
play_again = false;
}
}
}
}
Here is an alternative that achieves that same outcome
public class Main {
/**
* #param args the command line arguments
*/
public static void main(String[] args)
{
System.out.println(" Welcome ");
Random rand = new Random();
Scanner input = new Scanner(System.in);
int guess = 0;
int number_of_tries = 0;
System.out.println(" Try too guess a number between 1 and 100 -1 to close");
guess = input.nextInt(); //get first input
while (guess != -1)
{
int number_guess = rand.nextInt(5) + 1;
++number_of_tries;
//check if user wins and exits loop
if (isWin (number_guess,guess))
{
System.out.println(" You Win!!! ");
System.out.println(" The number was " + number_guess);
System.out.println(" It took you " + number_of_tries + " tries " +
"\nWould you like to play again? [1 yes/ -1 no]: ");
guess = input.nextInt();
if (guess == -1)
break;
else
System.out.println(" Try too guess a number between 1 and 100 -1 to close");
}
else if (number_guess < guess )
{
System.out.println(" Guess is too High " + "\n Guess another number to continue or -1 to quit ");
guess = input.nextInt();
continue;
}
else if (number_guess > guess)
{
System.out.println(" Guess is too low " + "\n Guess another number to continue or -1 to quit ");
guess = input.nextInt();
continue;
}
}
System.out.println ("bye bye");
}
public static boolean isWin (int number,int guess)
{
return (number == guess) ? true :false;
}
}
You forgot to wait for user input after this statement:
System.out.println(" It took you " + number_of_tries + " tries " +
"\nWould you like to play again? (y/n): ");
E.g. you could try next approach:
System.out.println(" It took you " + number_of_tries + " tries " +
"\nWould you like to play again? (y/n): ");
if (input.hasNext()) {
if (another.equalsIgnoreCase("y")) {
play_again = true;
input.next();
} else {
play_again = false;
}
}
It looks like your braces are messed up for your play again if statement
This will work.
package aa;
import java.util.Random;
import java.util.Scanner;
public class abc {
public static void main(String[] args) {
System.out.println(" Welcome ");
Random rand = new Random();
Scanner input = new Scanner(System.in);
boolean play_again = true;
while (play_again)
{
int number_guess = rand.nextInt(100)+1;
int number_of_tries = 0;
int guess;
String another = "y";
boolean win = false;
while (win == false)
{
System.out.println(" Try too guess a number between 1 and 100 ");
guess = input.nextInt();
number_of_tries++;
if (guess == number_guess)
{
win = true;
break;
}
else if (guess < number_guess)
{
System.out.println(" Guess is too low " + "\n Guess another number to continue or n to quit ");
if (input.hasNext("n"))
{
play_again = false;
break;
}
}
else if (guess > number_guess)
{
System.out.println(" Guess is too high " + "\n Guess another number to continue or n to quit ");
if (input.hasNext("n"))
{
play_again = false;
break;
}
}
}
input.next();
if (win == true){
System.out.println(" You Win!!! ");
}
else{
System.out.println(" Good Luck Next Time!!! ");
System.out.println(" The number was " + number_guess);
}
System.out.println(" It took you " + number_of_tries + " tries " +
"\nWould you like to play again? (y/n): ");
another = input.next();
if (another.equalsIgnoreCase("y") == true)
play_again = true;
else
{
play_again = false;
}
}
System.out.println("Thank you!!!");
}
}