KwickClips C++ · 43 sec · free
Which one gives zeros?
Short answer. calloc.
What should you always check?
That the result is not NULL.
malloc vs calloc
| Point | malloc | calloc |
|---|---|---|
| Arguments | total bytes | count, size |
| Values | garbage | zeros |
| On failure | NULL | NULL |
Remember
| calloc fills with zeros |
| Always check for NULL |
Both give heap memory. What is different? Compare. Malloc takes total bytes, calloc takes count and size. Malloc leaves garbage, calloc gives zeros. Both can return NULL. Remember this. Calloc fills zeros. Always check for NULL.
This clip is from the full lesson: Dynamic Memory Allocation: malloc, calloc, realloc and free — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Programming All levels C
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