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4_2005-2006 Coding Standards #155472

Absolute Recursive factorial function

Arjang
★★★★★
4.8 · Pobrania: 2,341

Recursive factorial function a recursive function is a function that will call itself it is probably the most difficult type of function designing but when you get use to it, you'll find it VERY USEFULL the c++ version of this function is also available write here.

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Kod źródłowy
original-source 
/* Recursive factorial function programmed by Arjang
For more info email me [email protected]
a recursive function is a function that will call itself
it is probably the most difficult type of function designing
but when you get use to it, you'll find it VERY USEFULL 
the c++ version of this function is also available write here.
*/
//inserting header file
#include<stdio.h>
//declaring function
int factorial(int);
void main(void)
{
	int number, result;
	printf("Please Enter A number to get it's factorial: ");
	//getting our target number
	scanf("%d", &number);
	//calling the function
	result = factorial(number + 1);
	//printing out results
	printf("\nThe factorial is : %d", result);
	printf("\n\n\n\n\n\n");
}
int factorial(int victim)
{
	
	if(victim>1)
	{
		victim = victim - 1;
		/*this is the whole point where you actually call the same function
		which you are into, it is called a recursive function. */
		victim = victim * factorial(victim);
	}
	return victim;
}

<?
/* Print out the HTML headers, and calendar header */
echo "<HTML>\n"
 . " <HEAD>\n"
 . " <STYLE>\n"
 . "  BODY, TD, TH\n"
 . "  {\n"
 . "   font-family: Verdana;\n"
 . "   font-size: 8pt;\n"
 . "  }\n"
 . " </style>\n"
 . " </head>\n"
 . " <BODY>\n";
/* Grab the month and year */
if ($month == "" || $year == "")
 {
 $this_month = date("n");
 $month_name = date("F");
 $this_year = date("Y");
 }
else
 {
 $this_month = date("n", mktime(0, 0, 0, $month, 1, $year));
 $month_name = date("F", mktime(0, 0, 0, $month, 1, $year));
 $this_year = date("Y", mktime(0, 0, 0, $month, 1, $year));
 }
/* This is for the navigation */
$last_month = $this_month - 1;
$next_month = $this_month + 1;
/* Same with all this stuff */
if ($last_month == 12)
 $last_year = $this_year - 1;
else
 $last_year = $this_year;
/* DITTO!!! */
if ($next_month == 1)
 $next_year = $this_year + 1;
else
 $next_year = $this_year;
/* Display the calendar header */
echo " <CENTER><B>Calendar for $month_name, $this_year</b></center><BR>\n" 
 . " <TABLE align=\"center\" border=\"2\" bordercolor=\"#000000\" cellpadding=\"5\" cellspacing=\"0\">\n"
 . "  <TR bgcolor=\"#DDDDDD\">\n"
 . "  <TH width=\"50\">Sun</th>\n"
 . "  <TH width=\"50\">Mon</th>\n"
 . "  <TH width=\"50\">Tue</th>\n"
 . "  <TH width=\"50\">Wed</th>\n"
 . "  <TH width=\"50\">Thu</th>\n"
 . "  <TH width=\"50\">Fri</th>\n"
 . "  <TH width=\"50\">Sat</th>\n"
 . "  </tr>\n";
/* Grab the first day of the month, and total days */
$first_day = date("w", mktime(0, 0, 0, $this_month, 1, $this_year));
$total_days = date("t", mktime(0, 0, 0, $this_month, 1, $this_year));
/* Start on the day of the first week */
$week_num = 1;
$day_num = 1;
/* While the day of the week isn't '7' */
while ($week_num <= 6)
 {
 echo "  <TR>\n";
  /* Loop through the week days */
  for ( $i = 0; $i <= 6; $i++ )
   {
   /* If it's the first week then... */
   if ($week_num == 1)
    {
    /* If it's not the first day yet, then use a space */
    if ($i < $first_day)
     $the_day = " ";
    /* If it is the first day, then start with a '1' */
    else if ($i == $first_day)
     {
     $the_day = 1;
     }
    }
   else
    {
    /* If we're past the total days, then use spaces */
    if ($the_day > $total_days)
     $the_day = " ";
    }
   /* Display the day (or space) */    
   echo "  <TD height=\"50\" width=\"50\" valign=\"top\">$the_day</td>\n";
   /* Incrememnt the day of the month */
   if ($the_day != " ")
    $the_day++;
   }
 echo "  </tr>\n";
 /* Increment the week number */
 $week_num++;
 }
/* Finish off with closing out our tags */
echo " </table>\n"
 . " <BR>\n"
 . " <CENTER>\n"
 . "  << <A href=\"?month=$last_month&year=$last_year\">Last Month</a> || <A href=\"?month=$next_month&year=$next_year\">Next Month</a> >>\n"
 . " </center>\n"
 . " </body>\n"
 . "</html>\n";
?>
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