KwickClips C++ · 40 sec · free
What does fopen return for a missing file?
Short answer. NULL.
When should you check?
Before reading.
Remember
| Missing file: fopen gives NULL |
| Check before you read |
What does fopen return when the file is missing? It returns NULL. So check it before reading. If it is NULL, show a message. Otherwise use and close the file. Remember this. A missing file gives NULL. Check before reading.
This clip is from the full lesson: File Handling in C — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Programming All levels C, Programming All levels C, Programming All levels C
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