| close_all_files | Close all open files. |
| close_file | Closing a text file. |
| fnew_line | Create a line feed. |
| fread_char | Read a character from a text file. |
| fread_line | Read a line from a text file. |
| fread_string | Read strings from a text file. |
| fwrite_string | Write values in a text file. |
| open_file | Open text file. |