國立暨南國際大學 102 學年度第二學期小考試卷

1. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   // Default Value of Parameters (P.302)
   // Static Variables in a Function (P.283)
   #include <iostream>
   using std::endl;
   using std::cout;
   
   int pop(int n = 1)
   {
       static unsigned short array [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
       static unsigned short length = sizeof array / sizeof array[0];
       while (n-- > 1)
           length--;
       return array[--length];
   }
   
   int main()
   {
       cout << pop(4) << endl;
       cout << pop(2) << endl;
       cout << pop( ) << endl;
       return 0;
   }
   
   
   
2. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   
   // Function Overloading (P.310)
   // Use of the const Modifier (P.270)
   // Strings and Character Arrays (P.174)
   #include <iostream>
   #include <cstring>
   using std::endl;
   using std::cout;
   
   int text_size(char c)
   { return sizeof(c); }
   
   int text_size(const char s[])
   { return strlen(s); }
   
   int main()
   {
       cout << text_size('T') << endl;
       cout << text_size('10') << endl;
       return 0;
   }
   
   
3. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   
   // Pointers to Functions (P.295)
   #include <iostream>
   
   int sum(int a, int b)
   { return a + b; }
   
   int product(int a, int b)
   { return a * b; }
   
   int main()
   {
       int (*pdo_it) (int, int) = product;
       pdo_it = sum;
       std::cout << pdo_it(3, 7) << std::endl;
       return 0;
   }