Question

The memory location at address 0x25164112 contains the memory variable J (J = 70), and the memory location at address 0x29661599 contains memory variable K (K= 41). If we declared

int *Ptr1, *Ptr2;
int J, K;
J = 70;
K = 41;
Ptr1 = &K;
Ptr2 = &J;
What is the hexadecimal value held by Ptr2 after executing the C/C++ statements above? Please enter a hexadecimal value without the prefix or suffix.

Answer 1

The hexadecimal value of Ptr2 would be the memory address of variable J at runtime. The exact value cannot be determined from the provided code alone and is system-dependent at the time of execution.

Step-by-step explanation:

A student has asked about the hexadecimal value held by a pointer variable Ptr2 after executing a series of C/C++ statements. To determine the value of Ptr2, we review the statements provided: int *Ptr1, *Ptr2; int J, K; J = 70; K = 41; Ptr1 = &K; Ptr2 = &J;. After these statements, Ptr2 holds the address of the variable J. The initial information about J being stored at address 0x25164112 is extraneous as the actual memory address for J is determined during runtime when the variable is declared and is system-dependent. Since in the provided code, Ptr2 is assigned the address of J, the hexadecimal value held by Ptr2 is the actual memory address where J is stored at the time of execution, which cannot be known from the given information without knowing the system's state during program execution.

Answer 2

The hexadecimal value held by Ptr2 after executing the C/C++ statements is 0x29661599.

Step-by-step explanation:

Declaration and Initialization:

Two integer pointers, Ptr1 and Ptr2, are declared along with integer variables J and K.

J is assigned the value 70, and K is assigned the value 41.

Ptr1 is assigned the address of K, and Ptr2 is assigned the address of J.

Memory Locations:

The memory location at address 0x25164112 contains the value of variable J (70).

The memory location at address 0x29661599 contains the value of variable K (41).

Ptr2 Assignment:

Ptr2 is assigned the address of variable J, which is 0x29661599.

Therefore, the hexadecimal value held by Ptr2 after executing the statements is 0x29661599.