C programing: factorial of a number

#include<stdio.h>

#include<conio.h>

void main()

{

            int n;

            void fact(int);

            clrscr();

            printf("Enter a number : ");

            scanf("%d",&n);

            fact(n);

            getch();

}

void fact(int n)

{

            int i;

            double fact = 1;

            for(i=1 ; i<=n ; i++)

            {

                        fact *= i;

            }

            printf("The factorial of %d is %f",n,fact);

}

 Md. Rusul  Azom Sumon

CSE, IUBAT