國立暨南國際大學 100 學年度第二學期小考試卷                   (考試時間: 14:10-14:20)

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	2012.3.14

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).
   // Using a static data member in a class
   #include <iostream>
   using std::cout;
   
   class CData
   {
   private:
       static int count;    // Can it be a private member?
   public:
       CData()  { ++count; }
       ~CData() { --count; }
       void ShowIt() { cout << count << '\n'; }
   };
   
   int CData::count = 0;
   
   int main()
   {
       CData apple[2];
       apple[0].ShowIt();
       CData iphone[4];
       iphone[0].ShowIt();
       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).
   // When is Destructor called?
   #include <iostream>
   using std::cout;
   
   class CData
   {
   private:
       static int count;   
   public:
       CData()  { ++count; }
       ~CData() { --count; }
       void ShowIt() { cout << count << '\n'; }
   };
   
   int CData::count = 0;
   
   void test1()
   {
       CData apple[2];
       apple[0].ShowIt();
   }
   
   void test2()
   {
       CData iphone[4];
       iphone[0].ShowIt();
   }
   
   int main()
   {
       test1();   
       test2();
       return 0;
   }