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猛邵
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1 考試時間 : 1 小時 30 分座號 : 全五頁第一頁注意 : 禁止使用電子計算器不必抄題, 作答時請將試題題號及答案依照順序寫在試卷上, 於本試題上作答者, 不予計分一就下列 Java 程式片斷中加入一個 for 迴圈, 使其印出右側結果 (15 分 ) public class AllNumbers number square cube public static void main( String[] args ) // print a header for the table System.out.printf( "%s\t%s\t%s\n", "number", "square", "cube" ); // 加入一個 for 迴圈 // // // end main 二承題一, 試於 for 迴圈內加入 if 判斷敘述, 以顯示下列結果 :(10 分 ) number square cube 三下列程式能將輸入的字串 input= abcdef, 反向列印為 fedcba 試以遞迴的方式撰寫副程式 stringreversehelper, 且其參數宣告必須與 stringreverse 方法內的呼叫一致 (25 分 ) public class Reverse public static void stringreverse( char[] array ) stringreversehelper( array, 0 ); System.out.println(); //stringreversehelper 副程式的放置處 public static void main( String args[] ) String input = "abcdef"; stringreverse( input.tochararray() ); // end main // end class Reverse ( 請接第二頁 )

2 全五頁第二頁四下列網頁按 button 鍵前後瀏覽器顯示的結果為何?(10 分 ) <!DOCTYPE html> <html> <body> <h2>what Can JavaScript Do?</h2> <p id="demo">javascript can change HTML content.</p> <button type="button" onclick='document.getelementbyid("demo").innerhtml="hello JavaScript!" '>Click Me!</button> </body> </html> 五根據下列程式回答問題 : Employee, HourlyEmployee, SalariedEmployee 三個類別的關係為何?(5 分 ) 試指出一個建構子, 並說明它的作用 (5 分 ) 試說明 SalariedEmployee 中 super(n) 的作用 (5 分 ) 試指出多型 (polymorphism) 出現的地方 (5 分 ) 執行 PayrollSystemTest 後印出的結果為何?(10 分 ) public abstract class Employee private String name; public Employee( String n ) name = n; public void setname( String str ) name = str; public String getname() return name; return String. format( "%s", getname() ); public abstract double earnings(); ( 請接第三頁 )

3 public class HourlyEmployee extends Employee private double wage; // wage per hour private double hours; // hours worked for week 全五頁第三頁 public HourlyEmployee( String n, double hourlywage, double hoursworked ) super( n ); setwage( hourlywage ); sethours( hoursworked ); public void setwage( double hourlywage ) if ( hourlywage >= 0.0 ) wage = hourlywage; throw new IllegalArgumentException("Hourly wage must be >= 0.0" ); public double getwage() return wage; public void sethours( double hoursworked ) if ( ( hoursworked >= 0.0 ) && ( hoursworked <= ) ) hours = hoursworked; throw new IllegalArgumentException("Hours worked must be >= 0.0 and <= 168.0" ); public double gethours() return hours; public double earnings() if ( gethours() <= 40 ) // no overtime return getwage() * gethours(); return 40 * getwage() + ( gethours() - 40 ) * getwage() * 1.5; return String. format( "hourly employee: %s\n%s: $%,.2f; %s: %,.2f", super.tostring(), "hourly wage", getwage(),"hours worked", gethours() ); ( 請接第四頁 ) ( 請接第三頁 )

4 全五頁第四頁 public class SalariedEmployee extends Employee private double weeklysalary; public SalariedEmployee( String n, double salary ) super( n ); setweeklysalary( salary ); public void setweeklysalary( double salary ) if ( salary >= 0.0 ) weeklysalary = salary; throw new IllegalArgumentException( "Weekly salary must be >= 0.0" ); public double getweeklysalary() return weeklysalary; public double earnings() return getweeklysalary(); // end method earnings return String. format( "salaried employee: %s\n%s: $%,.2f", super.tostring(), "weekly salary", getweeklysalary() ); // end method tostring // end class SalariedEmployee public class PayrollSystemTest public static void main( String[] args ) // create subclass objects SalariedEmployee salariedemployee = new SalariedEmployee( "Smith", ); HourlyEmployee hourlyemployee = new HourlyEmployee( "Price", 16.75, 40 ); System.out.println( "Employees processed individually:\n" ); System.out.printf( "%s\n%s: $%,.2f\n\n", salariedemployee, "earned", salariedemployee.earnings() ); System.out.printf( "%s\n%s: $%,.2f\n\n",hourlyEmployee, "earned", hourlyemployee.earnings() ); Employee[] employees = new Employee[ 2 ]; employees[ 0 ] = salariedemployee; employees[ 1 ] = hourlyemployee; for ( Employee currentemployee : employees ) System.out.println( currentemployee ); System.out.printf( "earned $%,.2f\n\n", currentemployee.earnings() ); // end for // end main // end class PayrollSystemTest ( 請接第五頁 )

5 六說明瀏覽器開啟下列網頁後顯示的訊息與可能的互動 (10 分 ) <!DOCTYPE html> <html> <body> 全五頁第五頁 <p>creating a JavaScript Object.</p> <p id="demo"></p> <p>show something.</p> <script> var person = firstname:"john", lastname:"doe", age:50, eyecolor:"blue"; window.alert( person.firstname + " is " + person.age + " years old."); </script> </body> </html> ( 請接第五頁 )

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内容简介本书是一本关于语言程序设计的教材, 涵盖了语言的基本语法和编程技术, 其中包含了作者对语言多年开发经验的总结, 目的是让初学的读者感受到语言的魅力, 并掌语言程序设计郑莉胡家威编著清华大学逸夫图书馆北京内容简介本书是一本关于语言程序设计的教材, 涵盖了语言的基本语法和编程技术, 其中包含了作者对语言多年开发经验的总结, 目的是让初学的读者感受到语言的魅力, 并掌握语