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).
   
   // sizeof operator
   #include <iostream>
   using std::cout;
   using std::endl;
   
   int main()
   {
       char* pstr[] = { "George Washington",
                       "John Adams",
                       "Thomas Jefferson",
                       "James Madison",
                       "James Monroe",
                       "John Quincy Adams"
                      };
       cout << sizeof pstr[5] << 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).
   
   // size of a char array
   #include <iostream>
   using std::cout;
   using std::endl;
   
   int main()
   {
       char str[][18] = { "George Washington",
                       "John Adams",
                       "Thomas Jefferson",
                       "James Madison",
                       "James Monroe",
                       "John Quincy Adams"
                      };
       cout << sizeof str[5] << endl;
       // What is the size of str[2]?   
       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).
   
   // Pointer arithmetic
   #include <iostream>
   using std::cout;
   using std::endl;
   
   int main()
   {
       int data[7] = { 1, 3, 5, 7, 2, 4, 6 };
       int* pnum = &data[2];
       cout << *(pnum + 2) - *(pnum +1) << endl;   
       return 0;
   }