int size = input.nextInt();

这段代码是从用户输入中读取一个整数值，并将其存储在变量size中。该代码中使用了Scanner类的nextInt()方法来读取输入，前提是先创建了一个Scanner对象来处理输入流。通常情况下，这段代码应该放在try-catch块中以处理可能抛出的InputMismatchException异常。例如：

Scanner input = new Scanner(System.in);
try {
    int size = input.nextInt();
    // 这里可以对size进行处理
} catch (InputMismatchException e) {
    System.out.println("请输入一个整数值！");
}

相关问题

import java.util.HashMap; import java.util.Scanner; import java.util.TreeSet; public class Main { public static void main(String args[]) { Scanner sc = new Scanner(System.in); String[] name = {"Captain", "Priest", "Cook", "Doctor", "Engineer", "Hunter", "Gunner", "Navigator"}; HashMap<String, Integer> map = new HashMap<>(); map.put(sc.next(), 1); int n = sc.nextInt(); for (int i = 0; i < n; i++) { String s = sc.nextLine(); String ss = s.split(":")[0]; map.put(ss, 1); } TreeSet<String> t = new TreeSet<>(); for (int i = 0; i < 8; i++) { if (!map.containsKey(name[i])) t.add(name[i]); } if (t.size() == 0) System.out.println("Ready"); else { for (Object o : t) System.out.println(o); } } }

以下是将Java代码转换为C语言代码的示例，为了简化代码，该示例省略了输入和输出部分的具体实现，需要您根据实际情况进行适当修改：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define NAME_SIZE 8

int main() {
    char name[NAME_SIZE][10] = {"Captain", "Priest", "Cook", "Doctor", "Engineer", "Hunter", "Gunner", "Navigator"};
    char input[100];
    int n = 0;
    scanf("%d", &n);
    getchar(); // 处理输入缓冲区残留的换行符
    int count = 0;
    int map[100] = {0};
    for (int i = 0; i < n; i++) {
        fgets(input, 100, stdin);
        char* p = strtok(input, ":");
        int index = -1;
        for (int j = 0; j < NAME_SIZE; j++) {
            if (strcmp(name[j], p) == 0) {
                index = j;
                break;
            }
        }
        if (index >= 0) {
            map[index] = 1;
            count++;
        }
    }
    for (int i = 0; i < NAME_SIZE; i++) {
        if (map[i] == 0) {
            printf("%s\n", name[i]);
        }
    }
    if (count == NAME_SIZE) {
        printf("Ready\n");
    }
    return 0;
}

需要注意的是，Java代码和C语言代码的语法和结构有很大的不同，因此在进行转换时需要仔细思考和分析，以确保转换后的代码逻辑正确、运行稳定。

用java将以下这段代码与图形界面结合起来package chap02; import java.util.*; public class GuessNumber { public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc=new Scanner(System.in); int targetNumber=(int)(Math.random()*10)+1; int guessCount=0;int maxTryTime=5; for(int i=0;i<maxTryTime;i++) { try { System.out.print("请输入一个0~10之间的数字："); int guessNumber= sc.nextInt(); guessCount++; if(guessCount<maxTryTime) {int a=maxTryTime; int c=a-i-1; if(guessNumber>targetNumber) { System.out.println("数人的过大，您还有"+c+"次机会"); continue; } else if(guessNumber<targetNumber) { System.out.println("数人的过小，您还有"+c+"次机会"); continue; } else { System.out.println("恭喜你，猜对了！"); System.out.print("你一共猜了"+guessCount+"次"); break; } } if(guessCount<maxTryTime) { System.out.println("抱歉游戏失败"); } } catch(Exception e) { System.out.println("输入异常，请重新输入!!!"); } } }}

好的，以下是一个简单的Java Swing实现，将上述代码与图形界面结合起来。代码创建了一个包含文本框、标签、按钮和消息框的GUI，以便用户可以输入猜测数字，查看游戏进度和结果。

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class GuessNumberGUI extends JFrame implements ActionListener {
    private JLabel promptLabel, resultLabel;
    private JTextField inputField;
    private JButton guessButton;
    private int targetNumber, guessCount, maxTryTime;

    public GuessNumberGUI() {
        targetNumber = (int)(Math.random()*10)+1;
        guessCount = 0;
        maxTryTime = 5;

        promptLabel = new JLabel("请输入一个0~10之间的数字：");
        inputField = new JTextField(10);
        guessButton = new JButton("猜！");
        guessButton.addActionListener(this);
        resultLabel = new JLabel("");

        JPanel panel = new JPanel();
        panel.add(promptLabel);
        panel.add(inputField);
        panel.add(guessButton);
        panel.add(resultLabel);

        this.add(panel);
        this.setTitle("猜数字游戏");
        this.setSize(300, 150);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        String inputText = inputField.getText();
        try {
            int guessNumber = Integer.parseInt(inputText);
            guessCount++;
            if (guessCount < maxTryTime) {
                int c = maxTryTime - guessCount;
                if (guessNumber > targetNumber) {
                    resultLabel.setText("数人的过大，您还有" + c + "次机会");
                } else if (guessNumber < targetNumber) {
                    resultLabel.setText("数人的过小，您还有" + c + "次机会");
                } else {
                    resultLabel.setText("恭喜你，猜对了！你一共猜了" + guessCount + "次");
                    guessButton.setEnabled(false);
                }
            } else {
                resultLabel.setText("抱歉游戏失败");
                guessButton.setEnabled(false);
            }
        } catch (NumberFormatException ex) {
            resultLabel.setText("输入异常，请重新输入!!!");
        }
    }

    public static void main(String[] args) {
        new GuessNumberGUI();
    }
}

希望这能帮到您！