[英]Java: Restarting program after achieving certain value
我正在制作一款允許用戶猜測隨機數的游戲。 如果用戶猜對了並且他/她決定再次玩,則必須生成一個新號碼。 我假設如果在開始時都將布爾值“ restart”設置為“ true”(此后不久將其設置為false),然后在“ restart”再次變為true之后將其設置為true,則程序將重新開始。 ..它沒。 看到我在做什么錯嗎? 謝謝。
import java.util.*;
import javax.swing.*;
import java.util.Scanner;
public class RandomGuess2
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
String userNum;
int userInput, numInt, genNum, amount = 0;
int repeatPlay = 0;
int x = 1;
boolean numTruth, restart;
boolean repeatIsYes = false;
restart = true;
userInput = JOptionPane.showConfirmDialog(null, "Would you like to try and guess the magic
number?", "Guessing Game", JOptionPane.YES_NO_OPTION);
genNum = (1 + (int)(Math.random() * 1000));
do
if((numTruth = (userInput == JOptionPane.YES_OPTION)) || (repeatIsYes = (userInput ==
JOptionPane.YES_OPTION)))
restart = false;
{
userNum = JOptionPane.showInputDialog(null,"Enter the number you're thinking between 1 &
1000: ");
numInt = Integer.parseInt(userNum);
if((numInt > 1000) || (numInt < 1)) {
JOptionPane.showMessageDialog(null, "Incorrect entry");
repeatIsYes = true;
}
else if(numInt > genNum) {
repeatIsYes = true;
repeatPlay = JOptionPane.showConfirmDialog(null, "You guessed too high!"
+ "\nWould you like to guess again?" + genNum);
}
else if(numInt < genNum) {
repeatIsYes = true;
repeatPlay = JOptionPane.showConfirmDialog(null, "You guessed too low!"
+ "\nWould you like to guess again?" + genNum);
}
else if(numInt == genNum) {
repeatIsYes = false;
repeatPlay = JOptionPane.showConfirmDialog(null, "How did you do that? You guessed
+ correctly!\nWould you like to guess again?" + genNum);
if(restart = (repeatPlay == JOptionPane.YES_OPTION))
{restart = true;}
}
if(repeatIsYes = (repeatPlay == JOptionPane.YES_OPTION)) {
numTruth = true;
repeatIsYes = true;
}
else {
numTruth = false;
repeatIsYes = false;
JOptionPane.showMessageDialog(null, "Goodbye! \nYou played " + amount + " times.");
break;
}
}
else {
numTruth = false;
repeatIsYes = false;
JOptionPane.showMessageDialog(null, "Goodbye!");
break;
}
while(numTruth = true);
}}
您從未真正使用過restart
,即只設置了它。 要使應用程序重新啟動,請在循環中的適當位置檢查“ restart
的值。
我沒有時間徹底閱讀您的代碼(順便說一句,由於格式和結構的原因,這很難閱讀),但是一個簡單的解決方案是使用兩個循環。
這是一些偽代碼:
while( playAnotherGame) { //this could be your "restart" flag
boolean gameIsRunning = true;
while( gameIsRunning ) {
//ask for user input
//check guesses
if( guessedCorrectly ) {
gameIsRunning = false; //game is finished
//display result
//ask for user input: restart or quit
if( quit ) {
playAnotherGame = false;
}
}
else {
//ask for user input: guess again, new game or quit
//handle user input
}
}
}
順便說一句,像這樣的結構容易出錯並且很難閱讀:
//you set and check repeatIsYes at the same time
if(repeatIsYes = (repeatPlay == JOptionPane.YES_OPTION)) {
numTruth = true;
repeatIsYes = true; //this is already true, see the if-condition
}
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