i need a simple code?

[tamara omar]

can someone help me by writing an iterative factorial function, and i have a homework says (compare the time complexity between iterative fatctorial and recursive factorial?

[thefarmer]

can someone help me by writing an iterative factorial function, and i have a homework says (compare the time complexity between iterative fatctorial and recursive factorial?

hi there,

hope this might be of help!!!!

#include <iostream>
using namespace std;

long factorial (long a)
{
if (a > 1)
return (a * factorial (a-1));
else
return (1);
}

int main ()
{

long number;
cout << "Please type a number: ";
cin >> number;
cout << number << "! = " << factorial (number);
return 0;
}

this might look very simple as you'd ask for

regards,

[MabZiCLe]

In turbo c: a simple one.

#include <studio.h>

main(){

int num, i;
int product=1;

printf(" Enter #: ");
scanf("%d", &num);

if(num==0) printf("%d! = %d", num, product);
if(num<0) printf("ERROR") ;
else {
for(i=1;i<=num; i++) product=product *i;
printf("%d! = %d", num, product);
}
getch();
}