How many arguments can be passed to a function in C?

All functions are global by default in a C program/file. But, static keyword makes a function as a local function which can be accessed only by the program/file where it is declared and defined. Other programs/files can’t access these static functions.

• atexit() function can be used if we want to execute any function after program is terminated normally.
• Syntax: int atexit (void (*func)(void));
• The function “func” will be called automatically without any arguments once program is terminated normally.

• exit() function terminates the program/process normally and returns the status code to the parent program/process.
• Syntax: void exit(int status)

• exit() is a system call which terminates current process. exit() is not an instruction of C language.
• Whereas, return() is a C language instruction/statement and it returns from the current function (i.e. provides exit status to calling function and provides control back to the calling function).

#define is a pre-processor directive which is used to define constant value. This constant can be any of the basic data types.

Below is the syntax for comments in C. The characters or words or anything which are given between “/*” and “*/”, won’t be considered by C compiler for compilation process. These will be ignored by C compiler during compilation.

Syntax: /* your comments here */

#pragma is a pre-processor macro in C. It is used to call a function before and after main function in a C program.

#include <stdio.h>

void function1( );
void function2( );

#pragma startup function1
#pragma exit function2

int main( )
{
                  </div>
                </div>
                        <div class="d-flex w-100 justify-content-between">
                <a style="color:#9e9d9d;" href="/tutorial/introduction-about-pre-processor/1/376">
                    <small># Tutorial: Introduction about Pre-processor</small> 
                </a>
            </div>
           
                        <a style="color:#9e9d9d;" href="/qa/-/1/36">
                <small><i class="fa fa-code" aria-hidden="true"></i> Question: C Pre-processor</small>
            </a>
                                   <span class="float-end" style="color:#9e9d9d"> <small><i class="fa fa-check" aria-hidden="true"></i> Short </small></span>  
                            </div>
      
            <div class="list-group divStyleQuestion" style="border:1px solid #e0e0e0;padding:8px">
            <div class="d-flex w-100 justify-content-between">
              <a href="/qanswer/how-will-you-override-an-existing-macro-in-c-question/36/665">
                  <h5 class="mb-1" style="color:#194757;">665. &nbsp;How will you override an existing macro in C?</h5>
              </a>
            </div>
                            <div class="card">
                  <div class="card-body">
                     Answer: <p>To override an existing macro, we need to undefine existing macro using &ldquo;#undef&rdquo;. Then, we need to define same macro again with new value.</p>                  </div>
                </div>
                        <div class="d-flex w-100 justify-content-between">
                <a style="color:#9e9d9d;" href="/tutorial/introduction-about-pre-processor/1/376">
                    <small># Tutorial: Introduction about Pre-processor</small> 
                </a>
            </div>
           
                        <a style="color:#9e9d9d;" href="/qa/-/1/36">
                <small><i class="fa fa-code" aria-hidden="true"></i> Question: C Pre-processor</small>
            </a>
                                   <span class="float-end" style="color:#9e9d9d"> <small><i class="fa fa-check" aria-hidden="true"></i> Short </small></span>  
                            </div>
      
                                    <li class="list-group-item d-flex justify-content-between align-items-center main-gradient-tutorials mb-2"><a href="http://www.atnyla.com/overview-of-java-language/0/2"><i class="fa fa-code" aria-hidden="true"></i> Chapterwise Java Program</a></li>
                                <li class="list-group-item d-flex justify-content-between align-items-center main-gradient-tutorials mb-2"><a href="http://www.atnyla.com/fundamentals-of-c-language/1/20"><i class="fa fa-code" aria-hidden="true"></i> Chapterwise C Program</a></li>
                                <li class="list-group-item d-flex justify-content-between align-items-center main-gradient-tutorials mb-2"><a href="http://www.atnyla.com/array/3/54"><i class="fa fa-code" aria-hidden="true"></i> Chapterwise Data Structure Program</a></li>
                            </ul>
                      <br>
                      
                  
                   </div>
 </div>
 
</div>
 </div> 
 </div>
 </div>
 </div>
<button onclick="topFunction()" id="myBtn" title="Go to top">Top</button>
<style>
         
 #myBtn {
  display: none; /* Hidden by default */
  position: fixed; /* Fixed/sticky position */
  bottom: 20px; /* Place the button at the bottom of the page */
  right: 30px; /* Place the button 30px from the right */
  z-index: 99; /* Make sure it does not overlap */
  border: none; /* Remove borders */
  outline: none; /* Remove outline */
  background-color: blue; /* Set a background color */
  background-color: transparent;
  box-shadow: 0 6px 6px rgba(0, 0, 0, 0.6);
  color: white; /* Text color */
  cursor: pointer; /* Add a mouse pointer on hover */
  padding: 15px; /* Some padding */
  border-radius: 10px; /* Rounded corners */
  font-size: 18px; /* Increase font size */
  border-radius: 50%;
}

#myBtn:hover {
  background-color: #00a7f5; /* Add a dark-grey background on hover */
}
</style>
     
<script>
// Get the button:
let mybutton = document.getElementById("myBtn");

// When the user scrolls down 20px from the top of the document, show the button
window.onscroll = function() {scrollFunction()};

function scrollFunction() {
  if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
    mybutton.style.display = "block";
  } else {
    mybutton.style.display = "none";
  }
}

// When the user clicks on the button, scroll to the top of the document
function topFunction() {
  document.body.scrollTop = 0; // For Safari
  document.documentElement.scrollTop = 0; // For Chrome, Firefox, IE and Opera
}
</script> 

<footer id="footer" style = "background: linear-gradient(to right, #1a2980, #26d0ce); margin-top: 10px;" class = "text-white p-3"> 
    <div class="footer-top">
      <div class="container-fluid">
        <div class="row"> 
          <div class="col-lg-2 col-md-6 footer-contact text-white"> 
          </div> 
          <div class="col-lg-3 col-md-6 footer-links text-white">
            <p style="font-size: 16px; color: white;">Useful Links</p>
            <ul>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/" class = "text-white">Home</a></li>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/about/" class = "text-white">About us</a></li> 
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/terms-and-conditions/" class = "text-white">Terms of service</a></li>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/about/guest-post" class = "text-white">Guest Post</a></li> 
              <li><i class="bx bx-chevron-right"></i> <a href="hhttps://www.atnyla.com/about/ads/" class = "text-white">Advertisement</a></li>
            </ul>
          </div> 
          <div class="col-lg-3 col-md-6 footer-links text-white">
            <p style="font-size: 16px; color: white;">Login</p>
            <ul>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/user/" class = "text-white">login</a></li>
              <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/user/" class = "text-white">Sign Up</a></li> 
            </ul>
          </div> 
          <div class="col-lg-3 col-md-6 footer-newsletter">
            <p style="font-size: 16px; color: white;">Visit All Home</p>
            <ul>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/syllabus/java-programming-language/0" class = "text-white">Syllabus</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/library/java-programming-language" class = "text-white">Subject</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/library/" class = "text-white">Library</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/gk-and-current-affairs" class = "text-white">GK/MCQ</a></li>
            <li><i class="bx bx-chevron-right"></i> <a href="https://www.atnyla.com/blog/" class = "text-white">Blog</a></li>
            <!--<p>Tamen quem nulla quae legam multos aute sint culpa legam noster magna</p>-->
            <!--<form action="" method="post">-->
            <!--  <input type="email" name="email"><input type="submit" value="Subscribe">-->
            <!--</form>-->
           </ul>
          </div> 
           <!--<div class="col-lg-2 col-md-6 footer-newsletter">-->
                <!-- <p style="font-size: 16px; color: white; ">Social Links</p>-->
                <!-- <ul> -->
                <!-- <li> <a href = "https://chat.whatsapp.com/BfdvA6k89H28bD4q4QqiaK" class="text-white">  Join Whatsapp Group  <i class="fa-brands fa-whatsapp"> </i> </a></li>-->
                <!--<li> <a href = "https://t.me/ComputerLanguageWithRumman" class="text-white">  Join Telegram Group  <i class="fa-brands fa-telegram"></i> </i> </a></li>-->
                <!--</ul>-->
            <!--</div>-->
        </div>
      </div>
    </div> 
    <div class="container d-md-flex   text-white"> 
      <div class="social-links text-center text-md-end pt-3 pt-md-0 text-white">
        <!--<a href="#" class="twitter"><i class="bx bxl-twitter"></i></a>-->
        <!--<a href="#" class="facebook"><i class="bx bxl-facebook"></i></a>-->
        <!--<a href="#" class="instagram"><i class="bx bxl-instagram"></i></a>-->
        <!--<a href="#" class="google-plus"><i class="bx bxl-skype"></i></a>-->
        <!--<a href="#" class="linkedin"><i class="bx bxl-linkedin"></i></a>-->
      </div>
    </div>
    
    <div class="me-md-auto text-center text-md-start">
        <div class="copyright text-center">
          © Copyright <strong><span>atnyla</span></strong>. All Rights Reserved
        </div>
        <div class="credits text-center"> 
          Designed by <a href="https://atnyla.com/"  style="color: white">atnyla.com</a>
        </div>
      </div> 
  </footer> 
    
<!-- Scripts -->
<!-- Bootstrap core JavaScript -->
<script src="https://atnyla.com/vendor/jquery/jquery.min.js"></script>

<script src="https://atnyla.com/vendor/bootstrap/js/bootstrap.bundle.min.js"></script>  

<script src="https://atnyla.com/assets/js/isotope.min.js"></script>  

<!--<script src=" https://unpkg.com/isotope-layout@3.0.6/dist/isotope.pkgd.min.js"></script>  -->

<script src="https://atnyla.com/assets/js/owl-carousel.js"></script>
<!--<script src="https://atnyla.com/assets/js/lightbox.js"></script>-->
<script src="https://atnyla.com/assets/js/tabs.js"></script>

<!--<script src="https://atnyla.com/assets/js/video.js"></script>-->
<!--<script src="https://atnyla.com/assets/js/slick-slider.js"></script>--> 

<script src="https://atnyla.com/assets/js/custom.js"></script> 

<!--<script src="https://cdn.jsdelivr.net/gh/google/code-prettify@master/loader/run_prettify.js"></script>-->
<!--<script src="https://cdn.jsdelivr.net/gh/google/code-prettify@master/loader/run_prettify.js?skin=desert"></script>-->

<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script> 
<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script> 
   
 
<script>
  //according to loftblog tut
  $(".nav li:first").addClass("active");

  var showSection = function showSection(section, isAnimate) {
    var direction = section.replace(/#/, ""),
      reqSection = $(".section").filter(
        '[data-section="' + direction + '"]'
      ),
      reqSectionPos = reqSection.offset().top - 0;

    if (isAnimate) {
      $("body, html").animate(
        {
          scrollTop: reqSectionPos,
        },
        800
      );
    } else {
      $("body, html").scrollTop(reqSectionPos);
    }
  };

  var checkSection = function checkSection() {
    $(".section").each(function () {
      var $this = $(this),
        topEdge = $this.offset().top - 80,
        bottomEdge = topEdge + $this.height(),
        wScroll = $(window).scrollTop();
      if (topEdge < wScroll && bottomEdge > wScroll) {
        var currentId = $this.data("section"),
          reqLink = $("a").filter("[href*=\\#" + currentId + "]");
        reqLink
          .closest("li")
          .addClass("active")
          .siblings()
          .removeClass("active");
      }
    });
  };

  $(".main-menu, .responsive-menu, .scroll-to-section").on(
    "click",
    "a",
    function (e) {
      e.preventDefault();
      showSection($(this).attr("href"), true);
    }
  );

  $(window).scroll(function () {
    checkSection();
  });
</script>
<script>
  $(document).ready(function () {
    $("#side-bar-toogle-btn").click(function () {
      $("#sidebar-list-group").toggle("slow");
    });
  });
</script> 
    
<script async src="https://fundingchoicesmessages.google.com/i/pub-7357847575760859?ers=1" nonce="P8qLHGFgH5IxNN3G6pLnUA"></script><script nonce="P8qLHGFgH5IxNN3G6pLnUA">(function() {function signalGooglefcPresent() {if (!window.frames['googlefcPresent']) {if (document.body) {const iframe = document.createElement('iframe'); iframe.style = 'width: 0; height: 0; border: none; z-index: -1000; left: -1000px; top: -1000px;'; iframe.style.display = 'none'; iframe.name = 'googlefcPresent'; document.body.appendChild(iframe);} else {setTimeout(signalGooglefcPresent, 0);}}}signalGooglefcPresent();})();</script>


<script src="https://cdn.rawgit.com/google/code-prettify/master/loader/run_prettify.js"></script>
<script>
// prettyPrint();
</script>
  
</body>
</html>