/*
   lab06.cpp
   7/6/2005
   CIS 150
   David G. Klick
   
   Solution to lab #6 (functions).
*/

#include <iostream>
using std::cout;

void displayName();
double average(double x1, double x2, double x3);
int fib(int n);
int magicBox(int n1, int n2=0, int n3=0);
double magicBox(double n1, double n2=1.0, double n3=1.0);

int main(void) {
   int i;
   
   displayName();
   cout << average(14.1, 7.8, 9.3) << '\n';
   for (i=0; i<=10; i++) {
      cout << "Fibonacci(" << i << ") = " << fib(i) << '\n';
   }
   cout << magicBox(3) << '\n';
   cout << magicBox(3, 4) << '\n';
   cout << magicBox(3, 4, 5) << '\n';
   cout << magicBox(3.0) << '\n';
   cout << magicBox(3.0, 4.0) << '\n';
   cout << magicBox(3.0, 4.0, 5.0) << '\n';
   return 0;
}


void displayName() {
   cout << "Dave\n";
}

double average(double x1, double x2, double x3) {
   return (x1 + x2 + x3) / 3.0;
}

int fib(int n) {
   if (n < 0) return 0;
   if (n < 2) return n;
   return fib(n-1) + fib(n-2);
}

int magicBox(int n1, int n2, int n3) {
   return n1 + n2 + n3;
}

double magicBox(double n1, double n2, double n3) {
   return n1 * n2 * n3;
}