Supported Format Specifiers
===========================

The implementation supports the following format specifiers:

- `%c`: Character
- `%s`: String
- `%d` or `%i`: Signed decimal integer
- `%u`: Unsigned decimal integer
- `%o`: Unsigned octal
- `%x`: Unsigned hexadecimal integer (lowercase)
- `%X`: Unsigned hexadecimal integer (uppercase)
- `%p`: Pointer address
- `%%`: Percent sign