國立暨南國際大學 101 學年度第一學期小考試卷

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).
   
   #include <iostream>
   using std::cout;
   using std::endl;
   
   int main()
   {
       unsigned char n = 255;
       cout << static_cast<unsigned short>(n++) << endl;
       cout << static_cast<unsigned short>(n) << 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).
   
   #include <iostream>
   
   int main()
   {
       int i;
       for (i=1; i<8; i++)
       {
           if (i>2)
           {
               if (i==4) continue;
               else break;
           }
           std::cout << i << std::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).
   
   #include <iostream>
   
   int main()
   {
       int n = 6;
       while (true)
       {
           std::cout << n << ' ';
           if (n==1) break;
           if (n % 2)
               n = 3 * n + 1;
           else
               n /= 2;
       }
       std::cout << std::endl;
       return 0;
   }