Marks the statements below about header files, as True/False.Read the spellings carefullyTrue False The stdio.h contains#ifndef _STDIO_H#define _STDIO_H    1as the first two lines,It is done to prevent  multiple inclusions of the same header files. #include <stdio.h>means copy paste the header file stdio.h in the place of the above line It's a common practice to move code of some of the functions to header files, and then #include those files, whenever needed. stdio.h contains the code for scanf(), printf() and getchar(). #include "my.h"means copy the file my.h from /usr/include, and paste it in the program, in place of the above line. The typical location for header files on Linuxes is /user/includes/headers/ Header files typically contain pre-processor directives, typedefs, and function prototypes only

Marks the statements below about header files, as True/False.Read the spellings carefullyTrue False The stdio.h contains#ifndef _STDIO_H#define _STDIO_H    1as the first two lines,It is done to prevent  multiple inclusions of the same header files. #include <stdio.h>means copy paste the header file stdio.h in the place of the above line It's a common practice to move code of some of the functions to header files, and then #include those files, whenever needed. stdio.h contains the code for scanf(), printf() and getchar(). #include "my.h"means copy the file my.h from /usr/include, and paste it in the program, in place of the above line. The typical location for header files on Linuxes is /user/includes/headers/ Header files typically contain pre-processor directives, typedefs, and function prototypes only

What is the following is invalid header file in C?*

Comment on the output of the following C code.#include <stdio.h>     #include "test.h"     #include "test.h"      int main()      {     //some code      }a.TRUEb.Compile time errorc.FALSEd.Depends on the compiler

Let us try to understand the basic structure of a simple C program.The C source code given below prints "Hello!" to the console.#include <stdio.h>void main() { printf("Hello!");}The first line of the program #include <stdio.h> has three parts:The # character is called the preprocessor directiveinclude is a commandstdio.h is the name of the header file that we are trying to includeA header file usually contains useful predefined functions.A preprocessor directive is executed before the compilation is done. We shall learn more about the preprocessor in later sections.Note: Preprocessor directives are lines included in a program that begin with the character #, which make them different from a typical source code text. They are invoked by the compiler to process some programs before compilation.The #include <stdio.h> preprocessor command includes the contents of the file stdio.h into our program, which makes the different I/O functions like printf(),scanf(), etc.. available for use.Click on Live Demo to know about the preprocessor command #include.The second line of the program void main() contains two parts:void in English means empty or nothing. In our program's context, void is the return type. It means that the function main() returns nothing.main() is a function (also called a subroutine) which is called by the operating system. main() is the starting point of execution in any C program.printf() is a function which is used to print the text specified within double-quotes to the standard output device ( i.e, Console/Monitor).The executable statements, which in this case, is a call to printf() function, must be enclosed within an open brace { and a close brace }.Select all the correct statements from the given statements:#include is a preprocessor command.Header files contain functions that are automatically generated by machines.C program can run without main() function.printf("CodeTantra"); statement prints CodeTantra on the console.

scanf() is a predefined function in______header file.Answer areaa) stdlib. hb) ctype. hc) stdio. hd) stdarg. H