國立暨南國際大學 106 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).
   
   // Pointer to Character
   #include <iostream>
   using std::cout;
   using std::endl;
   
   int main()
   {
       char word[] = "Tsai Ing-wen";
       char* p = word;
       std::cout << word[5] << std::endl;
       std::cout << p+5 << std::endl;
       std::cout << *(p+5) << std::endl;
       return 0;
   }
   
   
2. (10%) Assume this is a 64-bit computer. 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>
   
   int main(){
       const int MAX_LEN = 80;
       char msg[MAX_LEN] = "ALICE";
       char* p = msg;
       char msg2[] = "BOB";
       std::cout << sizeof(msg) << '\t' << sizeof(msg2) << std::endl;
       std::cout << sizeof(msg[0]) << '\t' << sizeof(p) << 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).
   
   // Pointer Operation
   #include <iostream>
   
   int main(){
      int n[] = {2, 0, 1, 8};
      int* p = &n[0];
      int* p1 = p;
   
      std::cout << *p << (*p)++ << std::endl;
      std::cout << *(++p);
      std::cout << *(p++) << std::endl;
      std::cout << ++(*p) << *(p1++) << *p << std::endl;
      return 0;
   }