我正在使用Joyce Farrell撰写的Java Programming book中的这个项目，我遇到了随机生成的数字和用户未正确检查的猜测的问题。例如，用户有3个猜测，让我们说他们的第一个猜测它2和第一个随机生成的数字是2程序将打印输出你输了。当猜测实际上是正确的。请帮我。我已经添加了该程序的详细信息以及我到目前为止所做的工作。
创建彩票游戏应用程序。生成三个随机数（请参阅附录D以获取帮助） 这样做），每个都在0到9之间。允许用户猜三个数字。比较每个 用户猜测三个随机数并显示包含用户的消息 猜测，随机确定的三位数字，以及用户拥有的金额 获胜如下。
任何一个匹配10 两个匹配100 三个匹配，不是1000 三个匹配，确切顺序为1,000,000
确保您的应用程序适应重复数字。例如，如果是用户 猜测1,2和3，随机生成的数字是1,1和1，不给用户 信用三个正确的猜测 - 只有一个。将文件另存为彩票。
我的源代码
// Filename: Lottery.java
// Written by: Andy A
// Written on: 14 January 2015
import java.util.Scanner;
import java.util.Random;
public class Lottery {
public static void main(String[] args) {
Scanner userInput = new Scanner(System.in);
Random ranNum = new Random();
// LIMIT Contains The Numbers From 0 - 9
// TIMES Contains The Number of Time ranNum Should Run
final int LIMIT = 9;
final int TIMES = 3;
// Users Guesses
int usersFirstGuess;
int usersSecondGuess;
int usersThirdGuess;
// Randomly Generated Numbers
final int GenFirst = ranNum.nextInt(LIMIT);
final int GenSecond = ranNum.nextInt(LIMIT);
final int GenThird = ranNum.nextInt(LIMIT);
// User is asked for 3 guesses
System.out.println("Please enter your first guess: ");
usersFirstGuess = userInput.nextInt();
System.out.println("Please enter your second guess: ");
usersSecondGuess = userInput.nextInt();
System.out.println("Please enter your third and final guess: ");
usersThirdGuess = userInput.nextInt();
// Winning Amounts
final double WinTen = 10;
final double WinHun = 100;
final double WinThund = 1000;
final double WinMillion = 1000000;
final int WinZero = 0;
// Shows the randomly generated numbers
for(int x = 0; x < TIMES; ++x)
System.out.print(ranNum.nextInt(LIMIT) + " ");
System.out.println();
// First Generated
if(GenFirst == usersFirstGuess ) {
System.out.println("You have won: $" + WinTen);
}
else if(GenSecond == usersSecondGuess) {
System.out.println("You have won: $" + WinTen);
}
else if(GenThird == usersThirdGuess) {
System.out.println("You have won: $" + WinTen);
}
}
}
答案 0 :(得分：4)
您正在使用ranNum.nextInt(LIMIT)打印新生成的数字，但是您要将用户输入与GenXXX变量中存储的数字进行比较。
解决方案：改为打印变量。
System.out.println(GenFirst + " " + GenSecond + " " + GenThird);
如果您仍想使用循环进行打印，可以将数字存储在数组中。
// generate
final int[] generated = new int[TIMES];
for (int x = 0; x < TIMES; x++)
generated[x] = ranNum.nextInt(LIMIT);
// print
for (int x = 0; x < TIMES; x++)
System.out.print(generated[x] + " ");
答案 1 :(得分：0)
这不是随机生成的数字的问题，而是您向用户展示它们的方式。
在if / else if语句之前，在for循环中，您生成新随机数。这意味着，与用户输入（genFirst）相比的数字可以是 3 ，但在for循环中向用户显示的数字是一个新的随机数，例如 2
要解决此问题，您应该显示生成的数字：
for (int ranInt : new int[] { GenFirst, GenSecond, GenThird}) {
System.out.println(ranInt);
}
这段代码创建了一个生成数字的数组，并通过它们打印它们。显然，您还可以print GenFirst，然后print GenSecond，然后print GenThird。
我希望这有帮助！
答案 2 :(得分：0)
完全， 你为什么打印
System.out.print(ranNum.nextInt(LIMIT) + " ");
何时应该只是打印
System.out.print(GenThird + " ");
System.out.print(GenSecond + " ");
System.out.print(GenFirst + " ");
答案 3 :(得分：0)
这应该可以解决问题。
// Filename: Lottery.java
// Written by: Andy A
// Written on: 14 January 2015
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.Random;
public class Lottery {
public static void main(String[] args) {
Scanner userInput = new Scanner(System.in);
Random ranNum = new Random();
// LIMIT Contains The Numbers From 0 - 9
// TIMES Contains The Number of Time ranNum Should Run
final int LIMIT = 9;
final int TIMES = 3;
// Users Guesses
int usersFirstGuess;
int usersSecondGuess;
int usersThirdGuess;
List<Integer> guesses = new ArrayList<>();
// Randomly Generated Numbers
final int GenFirst = ranNum.nextInt(LIMIT);
final int GenSecond = ranNum.nextInt(LIMIT);
final int GenThird = ranNum.nextInt(LIMIT);
// User is asked for 3 guesses
System.out.println("Please enter your first guess: ");
usersFirstGuess = userInput.nextInt();
guesses.add(usersFirstGuess);
System.out.println("Please enter your second guess: ");
usersSecondGuess = userInput.nextInt();
guesses.add(usersSecondGuess);
System.out.println("Please enter your third and final guess: ");
usersThirdGuess = userInput.nextInt();
guesses.add(usersThirdGuess);
// Winning Amounts
final double WinTen = 10;
final double WinHun = 100;
final double WinThund = 1000;
final double WinMillion = 1000000;
final int WinZero = 0;
// Shows the randomly generated numbers
System.out.println(GenFirst + " " + GenSecond + " " + GenThird);
List<Integer> lottery = new ArrayList<>();
lottery.add(GenFirst);
lottery.add(GenSecond);
lottery.add(GenThird);
if (guesses.equals(lottery)) {
System.out.println("You have won: $" + WinMillion);
} else {
int matchCount = 0;
for (Integer guessValue : guesses) {
if (lottery.contains(guessValue)) {
matchCount++;
lottery.remove(guessValue);
}
}
switch (matchCount) {
case 0:
System.out.println("You have won: $" + WinZero);
break;
case 1:
System.out.println("You have won: $" + WinTen);
break;
case 2:
System.out.println("You have won: $" + WinHun);
break;
case 3:
System.out.println("You have won: $" + WinThund);
break;
}
}
}
}