國立暨南國際大學 99 學年度第一學期小考試卷

Open book; turn off computer & mobile phone                    (考試時間: 16:30-16:45)

1. (10%) Determine whether the following code has syntax erros or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   

   // Ex7_01.cpp
   #include <iostream>
   using std::cout;
   using std::endl;
   
   // Definition of a struct to represent rectangles
   struct RECTANGLE
   {
     int Left;                            // Top-left point
     int Top;                             // coordinate pair
   
     int Right;                           // Bottom-right point
     int Bottom;                          // coordinate pair
   };
   
   long Area(const RECTANGLE aRect);
   void MoveRect(RECTANGLE aRect, int x, int y);
   
   int main(void)
   {
     RECTANGLE Hut1, Hut2;
   
     Hut1.Left = 70;
     Hut1.Top = 10;
     Hut1.Right = Hut1.Left + 25;
     Hut1.Bottom = 30;
   
     Hut2 = Hut1;                         // Define Hut2 the same as Hut1
     MoveRect(Hut2, 10, 90);              // Now move it to the right position
   
     cout << "Coordinates of Hut2 are "
          << Hut2.Left << "," << Hut2.Top << " and "
          << Hut2.Right << "," << Hut2.Bottom;
   
     cout << endl
          << "The area of Hut2 is "
          << Area(Hut2) << endl;
     return 0;
   }
   
   // Function to calculate the area of a rectangle
   long Area(const RECTANGLE aRect)
   {  return (aRect.Right - aRect.Left)*(aRect.Bottom - aRect.Top);
   }
   
   // Function to Move a Rectangle
   void MoveRect(RECTANGLE aRect, int x, int y)
   {
     int length(aRect.Right - aRect.Left);     // Get length of rectangle
     int width(aRect.Bottom - aRect.Top);      // Get width of rectangle
   
     aRect.Left = x;
     aRect.Top = y;                            // to new position
     aRect.Right = x + length;                 // Get bottom-right point as
     aRect.Bottom = y + width;                 // increment from new position
     return;
   }
   

2. (10%) Determine
   whether the following code has syntax erros or not.  If it is correct,
   predict its output.  If it is incorrect, point out the mistake(s).
   // Ex7_01.cpp
   // Exercising structures in the yard
   #include <iostream>
   using std::cout;
   using std::endl;
   
   // Definition of a struct to represent rectangles
   struct ListElement
   {
     int value;
     ListElement* pNext;
   };
   
   int main(void)
   {
   	ListElement LE5 = { 50, 0 };
   	ListElement LE4 = { 40, &LE5 };
   	ListElement LE3 = { 30, &LE4 };
   	ListElement LE2 = { 20, &LE3 };
   	ListElement LE1 = { 10, &LE2 };
   	ListElement* p = &LE1;
   	while (p != NULL)
   	{
   		cout << p->value << endl;
   		p = p->pNext;
   	}
     return 0;
   }