我正在学习编程，我想知道为什么我会收到错误，我不知道从哪里开始。请忽略static void Question_Four to Ten和评论。我还需要有关如何改进代码的提示。谢谢您的帮助， ThawingOrb。
/**
* @(#)QuizGameFinal2.java
*
*
* @author
* @version 1.00 2013/4/30
*/
import java.util.Scanner;
import java.lang.Math;
import java.lang.String;
public class QuizGameFinal2
{
public static void main(String[]args)
{
int option_Selected;
int option_Single_Player = 1;
int option_Multiplayer = 2;
int answer;
int player_One_Answer;
int player_Two_Answer;
String response;
int player_One_Winnings;
int player_Two_Winnings;
int winnings;
int computer_Winnings;
double computer_Answer;
Scanner input2 = new Scanner(System.in);
say_Intro();
say_Before_First_Question();
question_One();
human_Answer();
do
{
System.out.println("Enter a number between 1 and 3");
} while (answer < 1 && answer => 4);
if (answer == 1)
{
System.out.println("Correct Next Question");
question_Two();
human_Answer();
do
{
System.out.println("Enter a number between 1 and 4");
} while (answer < 1 && answer >= 5);
if (answer == 1 )
{
System.out.println("Correct Next Question");
question_Three();
human_Answer();
do
{
System.out.println("Enter a number between 1 and 4");
} while (answer < 1 && answer >= 5);
if (answer == 4)
{
System.out.println("Correct Next Question");
}
else
{
System.out.println("Incorrect you win 1000 dollers");
winnings = 1000;
}
}
else
{
System.out.println("Incorrect you win 500 dollers");
winnings = 500;
}
}
else
{
System.out.println("Incorrect you win 0 dollers");
winnings = 0;
}
} // End of main method
static void say_Intro() // Intro Method
{
System.out.println("Welcome to the QuizGame"); // Player selects which mode
System.out.println("Press 1 for Single Player");
System.out.println("Press 2 for Multiplayer");
Scanner input = new Scanner(System.in); // Scanner for the entire game
int option_Selected = input.nextInt();
do {
System.out.println("Please enter 1 or 2");
} while (option_Selected != 1 || option_Selected != 2);
}
public void say_Before_First_Question() // Before game method
{
System.out.println("Welcome to the quiz game.");
Scanner input = new Scanner(s);
System.out.print("Your response");
response = input.next();
System.out.println("");
System.out.println(" If you get a question wrong your out ok?");
System.out.print("Your Response:");
response = input.next();
System.out.println("Also you will be competing against a super computer, after you play then he will generate answers, if you have the most then you win");
System.out.println("Ok first question");
}
static void human_Answer () // Human Answer Single Player Method
{
int answer=input2.nextInt();
}
static void player_One_Answer() // Player One Multiplayer Method
{
int player_One_Answer = input2.nextInt();
}
static void player_Two_Answer() // Player two multiplayer Method
{
int player_Two_Answer = input2.nextInt();
}
static void computer_Answer () // Computer answer
{
double computer_Answer = (1-1 + 1) * Math.random + 1;
computer_Answer = (int)computer_Answer;
}
static void question_One() // Question 1 method
{
System.out.println("What is an application");
System.out.println("1: A program that performs a task 2:A mouse 3: java.util.Scanner");
}
static void question_Two() // Question 2 to 10 methods below
{
System.out.println("What is the data type that hold the value 1");
System.out.println("1: int 2:float 3: short 4: long ");
do
{
System.out.println("Enter a number between 1 and 4");
} while (answer < 1 && answer > 5);
}
static void question_Three()
{
System.out.println("What is a not a high level language");
System.out.println("1: Java 2:C++ 3: Colbolt 4: Machine Language ");
do
{
System.out.println("Enter a number between 1 and 3"); // Do this if the person enters a number less than one and greater than 3
} while (answer < 1 && answer > 4);
}
/* static void question_Five()
{
}
static void question_Six()
{
}
static void question_Seven()
{
}
static void question_Eight()
{
}
static void question_Nine()
{
}
static void question_Ten()
{
}
static void total_Winnings_Single_Player () // Calculating who wins method single player
{
if (computer_Winnings > winnings)
{
System.out.println("Computer Wins");
}
else
{
System.out.println("You win");
}
*/
}
// End of program
答案 0 :(得分：1)
你的程序是一个几乎无法解读的代码纠结。让我们改进您的程序结构。首先，请注意，处理问题的逻辑对于所有问题都是相同的。定义封装特定于问题的数据的Question类会很有用。然后，您可以编写一次逻辑。 Question类可能如下所示（包括用于初始化Question对象的构造函数）：
class Question {
/** The text of the question itself */
public String question;
/** The array of possible answers */
public String[] answers;
/** The index (zero-based) of the correct answer */
public int correctAnswer;
/** Construct a Question with the given values */
public Question(String question, String[] answers, int correct) {
this.question = question;
this.answers = answers;
this.correct = correct;
}
}
让问题打印出来也是有道理的。因此，让我们在printQuestion类中添加Question方法：
class Question {
. . . // as above
public void printQuestion() {
System.out.println(question);
for (int i = 0; i < answers.length; ++i) {
System.out.print((i + 1) + ": " + answers[i] + " ");
}
System.out.println();
}
}
现在让我们转向主程序。每次需要用户输入时，您都在创建一个新的Scanner对象。您只需要一个Scanner，但需要它才能访问所有需要它的代码。有两个选项：向需要输入的每个方法添加Scanner参数，或者使Scanner成为QuizGameFinal2类的实例变量。后者最有意义：
import java.util.Scanner;
public class QuizGameFinal2 {
Scanner input2;
public static void main(String[] args) {
input2 = new Scanner(System.in);
. . .
}
}
请注意，您永远不需要从Math包导入类（例如String和java.lang）;它们会自动导入。现在您可以开始编写用于处理问题的逻辑。首先，编写一个打印问题并获得用户答案的一般方法（这将是QuizGameFinal2的成员）：
public static int questionAndAnswer(Question question) {
question.printQuestion();
int n = question.answers.length;
int answer = input2.nextInt();
while (answer < 1 || answer > n) {
System.out.println("Enter a number between 1 and " + n);
answer = input2.nextInt();
}
return answer - 1; // subtract 1 so it is a zero-based index
}
现在我们可以继续开发main()方法了。以下是它的概述：
public static void main(String[] args) {
input2 = new Scanner(System.in);
Question[] questions = {
new Question("What is an application?",
new String[] {"A program that performs a task",
"A mouse",
"java.util.Scanner"},
0
),
new Question("What is the data type that hold the value 1?",
new String[] {"int", "float", "short", "long"},
0
),
. . . // etc.
}
say_Intro();
say_Before_First_Question();
for (Question q : questions) { // iterates through the questions in order
int answer = questionAndAnswer(q);
if (answer == q.answer) {
System.out.println("Correct! Next Question");
} else {
System.out.println("Incorrect. You're out!");
return;
}
// TODO: get computer answer; calculate winnings
}
System.out.println("Done!");
}
在您的计划中，您显然需要更多，但这可能会让您走上更高效的道路。
答案 1 :(得分：0)
大于或等于>=而不是=>。
方法say_Before_First_Question需要是静态的，才能从另一个静态方法（main）调用。
将方法定义更改为：
public static void say_Before_First_Question()
Math.random是一种方法，因此您需要()。它应该是Math.random()