    01: #include <iostream>
    02:
    03: using namespace std;
    04:
    05: /**
    06:    Computes a Fibonacci number.
    07:    @param n an integer
    08:    @return the nth Fibonacci number
    09: */
    10: int fib(int n)
    11: {
    12:    if (n <= 2) return 1;
    13:    else return fib(n - 1) + fib(n - 2);
    14: }
    15:
    16: int main()
    17: {
    18:    cout << "Enter n: ";
    19:    int n;
    20:    cin >> n;
    21:    int f = fib(n);
    22:    cout << "fib(" << n << ") = " << f << endl;
    23:    return 0;
    24: }