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).
   
   // Ex5_02.cpp
   // A futile attempt to modify caller arguments
   #include <iostream>
   using std::cout;
   
   int incr10(int num);           // Function prototype
   
   int main(void)
   {
      int num(3);
   
      cout << '\n' << "incr10(num) = " << incr10(num) << '\n'
           << "num = " << num << '\n';
      return 0;
   }
   
   // Function to increment a variable by 10
   int incr10(int num)            // Using the same name might help...
   {
      num += 10;                  // Increment the caller argument
      cout << "In the function, num = " << num << '\n';
      return num;                 // Return the incremented value
   }
   

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).
   // void function
   #include <iostream>
   using std::cout;
   
   void print_stars(int n);
   
   int main()
   {
       int j;
       for (j=5; j>1; j--)
           print_stars(j);
       return 0;
   }
   
   void print_stars(int n)
   {
       int i;
       for (i=0; i<n; i++)
           cout << "*";
       cout << '\n';
       return;
   }