What are common errors when using realloc in C?

What are some common errors when using realloc in C?

Some common errors include not checking if realloc returns NULL, losing the original pointer, and memory leaks.

Can you explain what happens if realloc fails?

If realloc fails, it returns NULL and the original memory block remains unchanged, which can lead to memory leaks if not handled.

How can I safely use realloc in my code?

Always check the return value of realloc. Store the result in a temporary pointer before assigning it back to avoid losing the original pointer.

What are the differences between malloc and realloc?

malloc allocates a new block of memory, while realloc resizes an existing block. realloc can also return NULL if it fails.