COMP9024 (19T0)

COMP9024 (19T0) Sample Midterm Exam

Data Structures and Algorithms

Question 3 (4 marks)

1. Given the following definition:

   int data[12] = {5, 3, 6, 2, 7, 4, 9, 1, 8};
   

   and assuming that &data[0] == 0x10000, what are the values of the following expressions?

   data + 4

   *data + 4

   *(data + 4)

   data[4]

   *(data + *(data + 3))

   data[data[2]]

2. Consider the following piece of code:

   typedef struct {
      int   studentID;
      int   age;
      char  gender;
      float WAM;
   } PersonT;
   
   PersonT per1;
   PersonT per2;
   PersonT *ptr;
   
   ptr = &per1;
   per1.studentID = 3141592;
   ptr->gender = 'M';
   ptr = &per2;
   ptr->studentID = 2718281;
   ptr->gender = 'F';
   per1.age = 25;
   per2.age = 24;
   ptr = &per1;
   per2.WAM = 86.0;
   ptr->WAM = 72.625;
   

   What are the values of the fields in the per1 and per2 record after execution of the above statements?

   Hint:  ptr->t  means the same as  (*ptr).t

Type your answers to the above questions into the file called q3.txt (provided) and submit it using the command:

$ submit q3

The above command will make a copy of q3.txt as your answer for this question.