需要帮助结束一个java程序上的while循环吗？该程序用于使用整数用户输入的石头、布、剪刀游戏
我和我的团队决定为CSIS 1400的学期末项目编写一个关于石头、纸、剪刀的游戏的java程序，并将其大部分编写出来，但不确定如何使用整数用户输入终止while循环。我们希望用户键入0并使循环停止。我们试图使用do while循环，但必须在循环外部初始化pChoice，这会干扰程序的功能 以下是我们目前掌握的代码：需要帮助结束一个java程序上的while循环吗？该程序用于使用整数用户输入的石头、布、剪刀游戏,java,arrays,random,while-loop,credentials,Java,Arrays,Random,While Loop,Credentials,我和我的团队决定为CSIS 1400的学期末项目编写一个关于石头、纸、剪刀的游戏的java程序，并将其大部分编写出来，但不确定如何使用整数用户输入终止while循环。我们希望用户键入0并使循环停止。我们试图使用do while循环，但必须在循环外部初始化pChoice，这会干扰程序的功能 以下是我们目前掌握的代码： package RPS; import java.util.Scanner; import java.util.Random; //import java.io.Console;
package RPS;
import java.util.Scanner;
import java.util.Random;
//import java.io.Console;
public class Game
{
public static void main (String[] args)
{
String username;
String password;
System.out.print ("Username: ");
username = Security.user();
System.out.print ("Password: ");
password = Security.pswd ();
//Console console = System.console ();
//password = new String (console.readPassword ("Password: "));
if ( username.equals (Security.jacobUser ()) && password.equals (Security.jacobPswd ()) ||
username.equals (Security.tuckerUser ()) && password.equals (Security.tuckerPswd ()) ||
username.equals (Security.austinUser ()) && password.equals (Security.austinPswd ()) )
{
Scanner input = new Scanner(System.in);
Random randRoll = new Random();
int choiceArray[] = {1, 2, 3};
System.out.println ("Hello, Welcome to Rock-Paper-Scissors!");
System.out.println ("Here are your choices:");
System.out.printf ("%d for Rock \n", choiceArray[0]);
System.out.printf ("%d for Paper \n", choiceArray[1]);
System.out.printf ("%d for Scissors \n", choiceArray[2]);
String doPlay = "yes";
String dontPlay = "no";
String playChoice;
int choice;
System.out.println ("Do you want to play?");
playChoice = input.nextLine ();
if (playChoice.equals (dontPlay))
{
System.out.println ("Program Terminated");
}
int cChoice;
int pChoice;
int cScore = 0, pScore = 0, tie = 0, rounds = 0;
while (playChoice.equals (doPlay) || Game.done ().equals (dontPlay))
{
System.out.println ("Please make a selection, or use 0 to end the game:");
cChoice = randRoll.nextInt (3) + 1;
pChoice = input.nextInt ();
if (pChoice == choiceArray[0] || pChoice == choiceArray[1] || pChoice == choiceArray[2])
{
if (pChoice == cChoice)
{
System.out.println ("Tie Game!");
System.out.println ();
tie++;
rounds++;
}
else
{
if (cChoice==1 && pChoice==3)
{
System.out.println ("Computer picked Rock!");
System.out.println ("Rock beats Scissors!");
System.out.println ("**Computer Wins!**");
System.out.println ();
cScore++;
rounds++;
}
if (cChoice==1 && pChoice==2)
{
System.out.println ("Computer picked Rock!");
System.out.println ("Paper beats Rock!");
System.out.println ("**Player Wins!**");
System.out.println ();
pScore++;
rounds++;
}
if (cChoice==2 && pChoice==3)
{
System.out.println ("Computer picked Paper!");
System.out.println ("Scissors beats Paper!");
System.out.println ("**Player Wins!**");
System.out.println ();
pScore++;
rounds++;
}
if (cChoice==2 && pChoice==1)
{
System.out.println ("Computer picked Paper!");
System.out.println ("Paper beats Rock!");
System.out.println ("**Computer Wins!**");
System.out.println ();
cScore++;
rounds++;
}
if (cChoice==3 && pChoice==1)
{
System.out.println ("Computer picked Scissors!");
System.out.println ("Rock beats Scissors!");
System.out.println ("**Player Wins!**");
System.out.println ();
pScore++;
rounds++;
}
if (cChoice==3 && pChoice==2)
{
System.out.println ("Computer picked Scissors!");
System.out.println ("Scissors beats Paper!");
System.out.println ("**Computer Wins!**");
System.out.println ();
cScore++;
rounds++;
}
}
System.out.println ("Scores: " + rounds +" rounds:");
System.out.println ("You\tComputer\tTies");
System.out.println (" "+ pScore +"\t " + cScore + "\t\t " + tie);
}
}
}
else
{
System.out.println ("Incorrect Credentials");
}
}
}
package RPS;
import java.util.Scanner;
import java.util.Random;
import java.io.Console;
public class Game
{
public static void main (String[] args)
{
System.out.println ("Credentials required.");
String username;
String password;
System.out.print ("Username: ");
username = Security.user();
Console console = System.console ();
password = new String (console.readPassword ("Password: "));
if ( username.equals (Security.jacobUser ()) && password.equals (Security.jacobPswd ()) ||
username.equals (Security.tuckerUser ()) && password.equals (Security.tuckerPswd ()) ||
username.equals (Security.austinUser ()) && password.equals (Security.austinPswd ()) )
{
Random randRoll = new Random();
Scanner input = new Scanner (System.in);
int choiceArray[] = {1, 2, 3};
System.out.println ("Hello, Welcome to Rock-Paper-Scissors!");
System.out.println ("Here are your choices:");
System.out.printf ("%d for Rock \n", choiceArray[0]);
System.out.printf ("%d for Paper \n", choiceArray[1]);
System.out.printf ("%d for Scissors \n", choiceArray[2]);
int cChoice;
int pChoice;
int cScore = 0, pScore = 0, tie = 0, rounds = 0;
do
{
System.out.println ("Please make a selection, or use 0 to end the game:");
cChoice = randRoll.nextInt (3) + 1;
pChoice = input.nextInt ();
if (pChoice == choiceArray[0] || pChoice == choiceArray[1] || pChoice == choiceArray[2])
{
if (pChoice == cChoice)
{
System.out.println ("Tie Game!");
System.out.println ();
tie++;
rounds++;
}
else
{
if (cChoice==1 && pChoice==3)
{
System.out.println ("Computer picked Rock!");
System.out.println ("Rock beats Scissors!");
System.out.println ("**Computer Wins!**");
System.out.println ();
cScore++;
rounds++;
}
if (cChoice==1 && pChoice==2)
{
System.out.println ("Computer picked Rock!");
System.out.println ("Paper beats Rock!");
System.out.println ("**Player Wins!**");
System.out.println ();
pScore++;
rounds++;
}
if (cChoice==2 && pChoice==3)
{
System.out.println ("Computer picked Paper!");
System.out.println ("Scissors beats Paper!");
System.out.println ("**Player Wins!**");
System.out.println ();
pScore++;
rounds++;
}
if (cChoice==2 && pChoice==1)
{
System.out.println ("Computer picked Paper!");
System.out.println ("Paper beats Rock!");
System.out.println ("**Computer Wins!**");
System.out.println ();
cScore++;
rounds++;
}
if (cChoice==3 && pChoice==1)
{
System.out.println ("Computer picked Scissors!");
System.out.println ("Rock beats Scissors!");
System.out.println ("**Player Wins!**");
System.out.println ();
pScore++;
rounds++;
}
if (cChoice==3 && pChoice==2)
{
System.out.println ("Computer picked Scissors!");
System.out.println ("Scissors beats Paper!");
System.out.println ("**Computer Wins!**");
System.out.println ();
cScore++;
rounds++;
}
}
}
}while (pChoice != 0);
System.out.println ("Here are the final standings.");
System.out.println ("Rounds: " + rounds);
System.out.println ("You\tComputer\tTies");
System.out.println (" "+ pScore +"\t " + cScore + "\t\t " + tie);
}
else
{
System.out.println ("Incorrect Credentials");
}
}
}
/*
* 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 RPS;
import java.util.Scanner;
/**
*
* @author Jacob, Tucker, Austin
*/
public class Security {
public static String user ()
{
Scanner input = new Scanner (System.in);
String username = input.nextLine ();
return username;
}
public static String pswd ()
{
Scanner input = new Scanner (System.in);
String password = input.nextLine ();
return password;
}
public static String jacobUser ()
{
String username = "jacob";
return username;
}
public static String jacobPswd ()
{
String password = "password";
return password;
}
public static String tuckerUser ()
{
String username = "tucker";
return username;
}
public static String tuckerPswd ()
{
String password = "password";
return password;
}
public static String austinUser ()
{
String username = "austin";
return username;
}
public static String austinPswd ()
{
String password = "password";
return password;
}
}
我们现在在使用javac时遇到编译错误。下面的评论中列出了详细信息 使用任何你觉得最容易的循环。但是把一个
中断内部命令。大概是
if (pChoice == 0) {
break;
}
这将导致执行从循环中退出。您可以将pchoice初始化为一个不会影响游戏的数字，以便使用while循环
另一种可能性是在循环之前初始化一个布尔变量，如果pchoice==0，该循环将被更改。在处理可重复的用户输入时，实现Do While循环通常是最好的方法
do {
System.out.println ("Please make a selection, or use 0 to end the game:");
cChoice = randRoll.nextInt (3) + 1;
pChoice = input.nextInt ();
if (pChoice == choiceArray[0] || pChoice == choiceArray[1] || pChoice == choiceArray[2])
{
...
// All your normal game stuff
...
}
}while(pChoice != 0)
pChoice在第一次通过循环时初始化您不需要将playChoice作为循环条件的一部分进行测试。它只用于初始化，如果他们不想玩，可以使用if语句退出
您可以调用game.done（）来测试它们是否完成了，但不显示该方法的作用。如果game.done（）将输入的整数与1、2或3一起测试，则将终止循环。由于您的玩家在游戏逻辑之前输入该数字，因此您还需要一个if语句来确定他们是否选择在输入后但在游戏逻辑之前结束游戏。类似于if（！（game.done（）.equals（dontPlay））
这样，只有当他们输入另一个选项时，游戏逻辑才会执行；这将跳过所有的游戏逻辑，当他们说他们想停止，然后退出循环的底部
祝你好运而不是半途而废。这将有助于我们在必须在循环外初始化pChoice时使用do，这将干扰问题中所述的程序功能。我们希望循环在用户选择石头、布或剪刀时继续执行，并根据玩家或计算机是否获胜或两者是否平局来增加分数。这将要求在循环内部初始化pChoice。为什么在do while循环外部初始化pChoice会影响程序的功能？抱歉，当我尝试实现do while循环时，我没有删除初始while（playChoice.equals（doPlay））这使得最后的while循环认为pChoice没有初始化。这就是为什么我认为我必须在循环之外初始化pChoice。我已经完成了我的源代码，但当我运行javac时，它不接受我的方法调用，但netbeans接受。它说找不到符号变量安全性。我无法通过netbeans运行它，因为console.readPassword只能在命令行中运行。Netbeans出现空指针异常错误。是否使用！input.equalsIgnoreCase在将我的整数强制转换为布尔值，然后将其分配给新的布尔变量之后？如果您指的是在循环之前使用布尔变量，则在（continuePlaying），然后在用户输入之后，您只需执行if（pchoice==0）{continuePlaying=false；}
和if（playtchoice==“dontPlay.equalsIgnoreCase（））{continueplay=false；}
但是像其他人建议的那样使用do-while循环可能更干净、更简单。if（playtchoice==“dontPlay.equalsIgnoreCase（））
。。。你确定吗，@yitzih？oops`（如果是playChoice.equalsIgnoreCase（“dontPlay”）“我的错，谢谢@davidwallace这是有意义的。我不知道break会在while循环中工作。我只在switch语句中使用过它。