Preprocessor directives are lines included in the code preceded by a hash sign (#). These lines are directives for the preprocessor. The preprocessor examines the code before actual compilation of code begins and resolves all these directives before any code is actually generated by regular statements.#define INF 10000000if( val == INF) {//Do something}After the preprocessor has replaced the directives, the code will beif( val == 10000000) { //Here INF is replaced by the value with which it's defined.//Do something}You can also define function macros which have parameters.#define add(a, b) a + bint x = add(a, b);The second statement after the preprocessor has replaced the directives will be:int x = a + b;To know more about preprocessor directives, you can go to this linkYou're spending your afternoon at a local school, teaching kids how to code. You give them a simple task: find the difference between the maximum and minimum values in an array of integers.After a few hours, they came up with some promising source code. Unfortunately, it doesn't compile! Since you don't want to discourage them, you decide to make their code work without modifying it by adding preprocessor macros.Review the locked stub code in your editor and add the preprocessor macros necessary to make the code work.Input FormatThe first line contains an integer, , denoting the size of the array.The second line contains space-separated integers, , describing the elements in the array.ConstraintsOutput FormatYou are not responsible for printing any output to stdout. Once the necessary preprocessor macros are written, the locked code in your editor will print a line that says , where is the difference between the maximum and minimum values in the array.Sample Input532 332 -23 -154 65Sample OutputResult = 486

Preprocessor directives are lines included in the code preceded by a hash sign (#). These lines are directives for the preprocessor. The preprocessor examines the code before actual compilation of code begins and resolves all these directives before any code is actually generated by regular statements.#define INF 10000000if( val == INF) {//Do something}After the preprocessor has replaced the directives, the code will beif( val == 10000000) { //Here INF is replaced by the value with which it's defined.//Do something}You can also define function macros which have parameters.#define add(a, b) a + bint x = add(a, b);The second statement after the preprocessor has replaced the directives will be:int x = a + b;To know more about preprocessor directives, you can go to this linkYou're spending your afternoon at a local school, teaching kids how to code. You give them a simple task: find the difference between the maximum and minimum values in an array of integers.After a few hours, they came up with some promising source code. Unfortunately, it doesn't compile! Since you don't want to discourage them, you decide to make their code work without modifying it by adding preprocessor macros.Review the locked stub code in your editor and add the preprocessor macros necessary to make the code work.Input FormatThe first line contains an integer, , denoting the size of the array.The second line contains space-separated integers, , describing the elements in the array.ConstraintsOutput FormatYou are not responsible for printing any output to stdout. Once the necessary preprocessor macros are written, the locked code in your editor will print a line that says , where is the difference between the maximum and minimum values in the array.Sample Input532 332 -23 -154 65Sample OutputResult = 486

what is Preprocessors and Preprocessors directives.

What does the hash ( # ) sign mean in PHP?It indicates variable declarationIt indicates line that are commented outIt indicates end of the statementIt indicates function declaration

Which is not a preprocessor directive of C-language?

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.