Version 5.0 The LEDA User Manual

unsigned fibonacci(unsigned n)
{
static leda::timer t("fibonacci");
// report total time upon destruction of t
leda::timer::measure m(t);
// starts the timer t when m is constructed, and stops t
// when m is destroyed, i.e. when the function returns
}
if (n < 1) return 0;
else if (n == 1) return 1;
else return fibonacci(n-1) + fibonacci(n-2);
int main()
{
std::cout