What is the stdio header file in C++?


 

In programming, there are many different types of headers which are used to enable various functionality. One such keyword that is widely used in C programming is "include stdio.h". 

 

It is the header which is used in both C and C++. However, most people are always confused about it and don't actually know its function or how it works. 

 

But it is important for you to know about stdio.h, and it's working to become a better programmer. So, in this blog, you will learn everything about stdio.h and its use in programming.

 

In the end section of this blog, we will also delve into the concept of online c compiler and editor.

 

What is include stdio.h in C++?

 

In C++ programming, include stdio.h is the most used built-in header file. Stdio stands for standard input and output, the function it serves. 

 

It is used at the top of the c code to let the program use the functions it serves. include stdio.h comes with three variables, along with many function definitions and macro definitions. The stdio.h header is basically all about input and output. 

 

Stdio.h Macro Library

In a program, the small piece of code is known as a Macro. There are various types of macros in "include stdio.h''. So, let's understand them one by one. 

 

  • EOF

EOF expands for End Of File. As its name represents, it is used at the end of a file. It contains a negative integer to represent the ending of the file. 

 

  • NULL

NULL is a macro that is used for a null pointer. A null pointer is a pointer that points to nothing. 

 

  • FOPEN_MAX

In include stdio.h, FOPEN_MAX is the Macro used to indicate the number of simultaneously openable files. It contains an integer which represents the number of how many files can be opened at once. 

 

  • FILE_MAX

FILE_MAX macro is used to indicate the size of a filename string. It means it has an integer which shows the maximum size of a file name in bytes. 

 

  • L_tmpnam

It is a macro similar to the FILE_MAX as it also represents a file size with an integer. However, it only represents the file size of a temporary filename string. 

 

  • BUFSIZ

BUFF SIZE stands for buffer size, which contains an integer to represent the size of the setbuf function. 

 

  • TMP_MAX

It has an integer that shows the maximum limit of generating unique filenames by a tmpnam function. 

 

  • stdin, stdout, stderr

Standard input, standard output and standard error are the pointers to the FILE object. 

 

  • _IOFBF, _IOLBF, _IONBF

Input Output Fully Buffered, Input Output Line Buffered, and Input-Output Unbuffered are the buffering mode macros in C++.

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