> For the complete documentation index, see [llms.txt](https://smadi0x86-blog.gitbook.io/smadi0x86-playground/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://smadi0x86-blog.gitbook.io/smadi0x86-playground/architecture/c-language/files.md).
# Files
## **File Structure in C**
* Files are continuous sequences of bytes ending with an EOF (End Of File) indicator.
* Current position denotes where read/write operations occur.
* Files can be in text or binary format.
## **File Handling Functions**
#### **Opening a File**:
```c
FILE *fopen(const char* restrict name, const char *restrict mode);
```
#### **Renaming a File**:
```c
int rename(const char *oldname, const char *newname);
```
#### **Closing a File**:
```c
int fclose(FILE *filePtr);
```
#### **Deleting a File**:
```c
int remove(const char* filename);
```
#### **Reading Characters from a File**:
```c
int fgetc(FILE *filePtr);
int getc(FILE *filePtr);
```
#### **Reading Strings from a File**:
```c
char *fgets(char *str, int nchars, FILE *stream);
```
#### **Reading Formatted Input**:
```c
int fscanf(FILE *stream, const char *format, ...);
```
#### **Writing Characters to a File**:
```c
int fputc(int c, FILE *filePtr);
int putc(int c, FILE *filePtr);
```
#### **Writing Strings to a File**:
```c
int fputs(const char *str, FILE *stream);
```
#### **Writing Formatted Output**:
```c
int fprintf(FILE *stream, const char *format, ...);
```
#### **Miscellaneous Functions**:
* Checking for end of file: `int feof(FILE *filePtr);`
* Flushing data to file: `int fflush(FILE *filePtr);`
* Get current file position: `int fgetpos(FILE *stream, fpos_t *pos);`
* Set file position: `int fseek(FILE *stream, long int offset, int whence);`
* Get current position in file: `long ftell(FILE *stream);`
#### **Example of Repositioning File Stream**:
Using `fseek()`, you can move the file pointer to a desired location.
#### **Writing/Reading Integers**:
Use `putw()` to write and `getw()` to read.
#### **Flushing a File**:
`fflush()` flushes the output buffer of a file stream.