exercise3_14.java

java程序设计导论（daniel liang著） 所有偶数课后习题答案

// Exercise3_14.java
import javax.swing.*;

public class Exercise3_14 {
    public static void main(String[] args) {
        // Prompt the user to enter the number of students
        String numOfStudentsString = JOptionPane.showInputDialog("Enter the number of students:");
        int numOfStudents = Integer.parseInt(numOfStudentsString);
        
        String student1 = JOptionPane.showInputDialog("Enter a student name:");
        double score1 = Integer.parseInt(JOptionPane.showInputDialog("Enter a student score:"));
        
        String student2 = JOptionPane.showInputDialog("Enter a student name:");
        double score2 = Integer.parseInt(JOptionPane.showInputDialog("Enter a student score:"));

        if (score1 < score2) {
            // Swap
            String tempString = student1;
            double tempScore = score1;
            
            student1 = student2;
            score1 = score2;
            
            student2 = tempString;
            score2 = tempScore;
        }
        
        for (int i = 0; i < numOfStudents - 2; i++) {
           String student = JOptionPane.showInputDialog("Enter a student name:");
           double score = Integer.parseInt(JOptionPane.showInputDialog("Enter a student score:"));

           if (score > score1) {
               student2 = student1;
               score2 = score1;
               
               student1 = student;
               score1 = score;
           } 
           else if (score > score2) {
               student2 = student;
               score2 = score;
           } 
        }
            
        System.out.println("Top two students:");
        System.out.println(student1 + "'s score is " + score1);
        System.out.println(student2 + "'s score is " + score2);
        
        System.exit(0);
    } 
}