20.21. Write a program that read a positive integer and display its factorial.

#include<stdio.h>
#include<conio.h> 

#include<stdlib.h>
void main ()

{
int *i,*n;

long *fact;

i=(int *)malloc(sizeof(int));

n=(int *)malloc(sizeof(int));

fact=(long *)malloc(sizeof(int));

clrscr();
printf("Enter any number: ");

scanf("%d", n);

*fact=1;

for(*i=1;*i<=*n;(*i)++)

*fact=*fact**i;

printf("Factorial %d =%ld",*n,*fact);
getch ();
}