CSTDIO

This is the C++ version of the C standard header <stdio.h>, providing functionalities for input and output operations using the C standard I/O library. It includes functions for reading and writing data to files or the console, such as printf(), scanf(), fopen(), fclose(), fread(), fwrite(), and fprintf(). These functions operate at a lower level than C++ streams (like cin and cout) and are widely used for formatted I/O, particularly when performance or compatibility with C code is important. <cstdio> is part of the C++ Standard Library and places all identifiers in the std namespace, offering an interface that bridges traditional C-style I/O with C++ programs.