C examples for File:File Operation
File Modes for fopen()
| Mode | Description |
|---|---|
| "w" | Open a text file and truncate to zero length or create a text file for write operations. |
| "uw" | Open a text file with default permissions and truncate to zero length or create a text file for write operations. |
| "wx" | Create a text file for write operations. |
| "uwx" | Create a text file with default permissions for write operations. |
| "a" | Open a text file for append operations, adding to the end of the file. |
| "ua" | Open a text file with default permissions for append operations, adding to the end of the file. |
| "r" | Open a text file for read operations. |
| "wb" | Open a binary file and truncate to zero length or create a binary file for write operations. |
| "uwb" | Open a binary file with default permissions and truncate to zero length or create a binary file for write operations. |
| "wbx" | Create a binary file for write operations. |
| "ab" | Open a binary file for append operations. |
| "rb" | Open a binary file for read operations. |
| "w+" | Open or create a text file for update operations. An existing file will be truncated to zero length. |
| "a+" | Open or create a text file for update operations, adding to the end of the file. |
| "r+" | Open a text file for update operations (read and write anywhere). |
| "w+x" | Create a text file for updating. |
| "uw+x" | Create a text file with default permissions for updating. |
| "w+b" or "wb+" | Open or create a binary file for update operations. An existing file will be truncated to zero length. |
| "w+bx" or "wb+x" | Create a binary file for update operations. |
| "a+b" or "ab+" | Open a binary file for update operations, adding to the end of the file. |
| "r+b" or "rb+" | Open a binary file for update operations (read and write anywhere). |