#include
#include
using namespace std;
#define LENGTH 20
long double iterativeFunction(unsigned int n); // Iterative solution
long double recursiveFunction(unsigned int n); // Recursive solution
int main()
{
unsigned int n;
cout << fixed << setprecision(0);
cout << setw(10) << "n" << setw(30) << "Factorial of n"
<< " (Iterative solution)\n" << endl;
for( n = 0; n <= LENGTH; ++n)
cout << setw(10) << n << setw(30) << iterativeFunction(n)
<< endl;
cout << "Go on with ";
cin.get();
cout << setw(10) << "n" << setw(30) << "Factorial of n"
<< " (Recursive solution)\n" << endl;
for( n = 0; n <= LENGTH; ++n)
cout << setw(10) << n << setw(30) << recursiveFunction(n)
<< endl;
cout << endl;
return 0;
}
long double iterativeFunction(unsigned int n) // Iterative solution.
{
long double result = 1.0;
for( unsigned int i = 2; i <= n; ++i)
result *= i;
return result;
}
long double recursiveFunction(unsigned int n) // Recursive solution.
{
if( n <= 1)
return 1.0;
else
return recursiveFunction(n-1) * n;
}