Which function is used to change the size of a previously allocated memory block in C?
Options
- A. calloc()
- B. realloc()
- C. memset()
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
B. realloc()
Detailed Explanation
Answer: (B) realloc()
realloc() is used to change the size of a memory block that was previously allocated dynamically.
It can be used when a program needs more or less memory than originally requested.
The memory block may be moved to a different location if sufficient space is not available at its current location.
Therefore, after a successful realloc(), the returned pointer should be used because the memory address may have changed.