What does the following code print?#include using namespace std; int* allocateMemory() { int *ptr = new int; *ptr = 10; return ptr; } int main() { int *p = allocateMemory(); cout

Question

What does the following code print?#include <iostream> using namespace std; int* allocateMemory() {
int *ptr = new int; *ptr = 10; return ptr; }
int main() {
int *p = allocateMemory(); cout << *p << endl; delete p; return 0; }

BlackTom AI · Accepted Answer

The question presents a small C++ program that allocates memory, assigns a value, prints it, and then frees the memory. 
Option analysis: 
Since the only provided option is 'c. The program will print 10.', we will validate that outcome.
First, the function allocateMemory creates a new int on the heap with new int; it then assigns *ptr = 10, and returns the pointer to that allocated int. This means the memory location in main points to contains the value 10. 
In main, int *p = allocateMemory(); assigns that returned pointer to p. The next statement cout << *p << endl; dereferences p, yielding the value stored at that memory location, which is 10, and prints it followed by a newline. 
After printing, delete p; properly frees the dynamically allocated int to avoid a memory leak. This is the correct way to deallocate memory allocated with new.
Potential pitfalls or misconceptions to guard against: 
- If one forgot to delete p, there would be a memory leak, but that would not change the printed value. 
- If the code attempted to delete p and then use *p again, that would be undefined behavior, but here there is no further dereferencing after delete. 
- If the function returned a local stack variable's address, that would be dangerous, but the code uses new to allocate on the heap, which is valid to return from the function. 
In summary, the program prints 10, as the value assigned to the allocated integer is 10 and that value is output before the memory is freed.

CPT111W PRINSIP PENGATURCARAAN (PRINCIPLES OF PROGRAMMING)

What does the following code print?#include <iostream> using namespace std; int* allocateMemory() { int ptr = new int; ptr = 10; return ptr; } int main() { int p = allocateMemory(); cout << p << endl; delete p; return 0; }

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