1.
1) Declare and initialize a pointer px to an integer variable x with the initialized value 3.
Consider two cases of the value of x allocate on
(a) the stack memory
(b) the heap memory
2) Write a comment on each instruction down below and provide a memory diagram for heap
and stack to illustrate these statements.
int* iptr = new int[5]; //
int* iptr_1 = new int(5); //
Solution
Question 1)
(a)the stack memory
Answer: Decleration and initialization of pointer is given below:
int x = 3 // Here x is a integer variable having value 3
int* px = NULL; //Here we have decleared a pointer of integer type named px, which initially
point to NULL
px = &x; // integer pointer px holding the address of integer variable
cout<<*px // *px results into value 3
b) the heap memory
int x = 3; // Here x is a integer variable having value 3
int* px = new int(x); //Here we have created a interger pointer px and alloaced dynamic memory
to it using new operator and its point to the value of x
cout<<*px // this statement results into value 3
Question 2)

2.
int* iptr = new int[5]; //Here iptr is a interger pointer pointing to the first index that is 0th
index of an interger array having 5 elements;
int* iptr_1 = new int(5); //Here iptr is a interger pointer pointing to the value 5