What header file is stdio.h?

Generally, in C language or C, the extension name of the file used to #include is .h, which is called header file. The purpose of the #include file is to put content common to multiple compilation units (that is, c or cpp files) into a separate file to reduce the overall code size; or to provide cross-project common code.

In the current c version, the application of this header file should be #include<stdio.h>

##stdio refers to "standard input & output" (standard input and output)

So, if the standard input and output functions are used in the source code, this header file must be included!

For example, printf("%d",i); scanf("%d",&i); and other functions in C language.

Reference method

#include <stdio.h>

(Note: In TC2.0, it is allowed to directly call the functions in this header file without referencing it, but this approach is not standard . It is also not recommended to do this to avoid problems that cannot be compiled or executed in other IDEs.)

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