國立暨南國際大學 100 學年度第二學期小考試卷                   (考試時間: 09:10-09:20)
科目名稱：資訊系統 與網路導論 開課系所：資訊工程 學系 任課教師
 吳坤熹
系所別：
 年級：
 學號：
 姓名：
 考試日期
 2012.4.20
  1. (10%) Determine whether the following code has syntax errors or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
     
    // Virtual Function
    #include <iostream>
    using std::cout;

    class CBox
    {
    protected:
    	int volume;
    public:
    	CBox(int v = 0): volume(v) {}
    	int Volume() { return volume; }
    	void ShowVolume() { cout << Volume() << '\n'; }
    };

    class CGlassBox: public CBox
    {
    public:
    	CGlassBox(int v = 0): CBox(v) {}
    	int Volume() { return 0.25*volume; }
    };

    int main()
    {
    	CBox myBox(24);
    	CGlassBox yourBox(24);
    	myBox.ShowVolume();
    	yourBox.ShowVolume();
    	return 0;
    }




  2. (10%) Determine whether the following code has syntax errors or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
    // Virtual Function
    #include <iostream>
    using std::cout;

    class CBox
    {
    protected:
    	int volume;
    public:
    	CBox(int v = 0): volume(v) {}
    	virtual int Volume() { return volume; }
    	virtual void ShowVolume() { cout << Volume() << '\n'; }
    };

    class CGlassBox: public CBox
    {
    public:
    	CGlassBox(int v = 0): CBox(v) {}
    	virtual int Volume() { return 0.25*volume; }
    	virtual void ShowVolume() { cout << Volume() << '\n'; }
    };

    int main()
    {
    	CBox myBox(24);
    	CGlassBox yourBox(24);
    	myBox.ShowVolume();
    	yourBox.ShowVolume();
    	return 0;
    }