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C Language > Learn C Language > Why we use 'include stdio.h'?
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Why we use 'include stdio.h'?

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The header file which is added to the program that one has written is basically what 'include stdio.h.' means. Stdio.h is known to contain the input and output operations like "printf" or "scanf" etc. "h" extension means the header file. If you request to use a header file in the program by actually...
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The header file which is added to the program that one has written is basically what 'include stdio.h.' means. Stdio.h is known to contain the input and output operations like "printf" or "scanf" etc. "h" extension means the header file.

If you request to use a header file in the program by actually including it with the preprocessed C directive #include like you have seen the inclusion of stdio.h header file, which comes along with the compiler you are using.

If the header file is equal to that of copying the header file, it is advised not to do it because it would be inevitable to get an error and it's, of course, a bad idea to copy the content of the header file into its designated source files, as in if at all one has multiple source files in a written program.


In layman's terms, It's effortless .#include is what is known as a "preprocessor". As the name suggests, it is preprocessed before the code. These preprocessor statements are compiled before any other code in your script.
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Expert In Computer Languages

stdio.h is the header file for standard input and output. This is useful for getting the input from the user(Keyboard) and output result text to the monitor(screen). With out this header file, one can not display the results to the users on the screen or cannot input the values through the keyb...
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Computer Engineering / Diploma Tutor

STDIO.H is a file which contain declaration of many functions and Macros which required to get input from input devices and show output on output screen of C Program. It is not compulsory to include "stdio.h" as we can provide input to c program using any other program like DOS and can store output...
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STDIO.H is a file which contain declaration of many functions and Macros which required to get input from input devices and show output on output screen of C Program. It is not compulsory to include "stdio.h" as we can provide input to c program using any other program like DOS and can store output to any FILE. Which we can see later. read less
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We use to 'include stdio.h' to include the header.
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stdio.h is a header file which contains the declarations (not the definitions) of standard I/O functions like printf(), scanf(), etc.,. The header file just tells the compiler what types external functions and variables are, defines macros, types etc. Any functions and variables that get referenced in...
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stdio.h is a header file which contains the declarations (not the definitions) of standard I/O functions like printf(), scanf(), etc.,. The header file just tells the compiler what types external functions and variables are, defines macros, types etc. Any functions and variables that get referenced in your source file will be linked in during the linker phase. If you include stdio.h and use printf in your program, the compiler adds printf as an "unresolved" symbol in the object file, and then the linker will try to find a function called printf either in the object files you explicitly link, or in the libraries it is configured to search. read less
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B.E (Computer Science & Engineering) 78%; MS (Computer Science) (USA) (GPA: 3.8/4.0)

stdio.h contains prototypes for standard input/output functions like scanf/printf. Without including this file, one will not be able to read input from keyboard or write output to screen.
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Can teach any computer subjects for classes BCA,BCS ,BE(computer) and MCA

Studio.h is a header file which contains function definitions for all input output functions like printf scanf gets puts fetch etc which are been called by the programmer in the program for accepting and displaying input and output.
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Data Science, Machine Learning and Web Development Coach

"stdio" stands for standard input-output. Some of the most commonly used pre-written functions are getc(), putc(), gets(), puts(), scanf(), printf() and also their file IO counter parts such as fputs(), fgets(), fprintf(), fscanf(), etc., are packaged into stdio.h. This package also includes certain...
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"stdio" stands for standard input-output. Some of the most commonly used pre-written functions are getc(), putc(), gets(), puts(), scanf(), printf() and also their file IO counter parts such as fputs(), fgets(), fprintf(), fscanf(), etc., are packaged into stdio.h. This package also includes certain special functions such as fflush() and file IO related functions such as fopen(), feof(), fclose(), ftell(), fseek(), fwrite(), fread(), etc. Most of the C programs include one or more of the above functions to achieve a given task. Hence, it has to be included as a header file. read less
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Ph.D. in Bioinformatics

It is a header file or library for Standard Input and Output as it shows by name std(Standard)-i(input)-o(output). The function printf, Scanf, gets, puts etc will not work and will not be able to provide any input to program or get output from the program. Better way to understand any header file is...
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It is a header file or library for Standard Input and Output as it shows by name std(Standard)-i(input)-o(output). The function printf, Scanf, gets, puts etc will not work and will not be able to provide any input to program or get output from the program. Better way to understand any header file is to remove the header file and execute the program and then see what are the errors you are getting. read less
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Computer Science Tutor

stdio.h is a header file in C, it is the file which contains C declaration and Macro definition to be shared between several files. stdio.h means standard input/output function which contains printf(), scanf() functions.
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