1st year of college, second semester in, and i think i'm on the verge of failing, so i thought i'd finally join to get some good advice. my teacher is ok, but mostly unclear on how to do certain things. This time, its recursive functions.

i am suppose to write a recursive function to find the nth Fibonacci number and then find the run-time. this is what i think i'm suppose to do:

Code:
long int fib(int n)
{
if (n==1 || n==2) return 0;
else return fib (n-1) + fib(n-2);
}
but where do i put the "cin" to enter in the nth term? then at the end i believe im suppose to put:

Code:
int main ()
{
int start, end, n;
start=clock();
cout << #(n);
end=clock();
cout << "Run-time- " << (end-start)/1000
return 0;
}
although im not positive on the clock thing. 50 minute lesson on this and i came out not having a clue. hopefully someone can clear thing up for me. Thanks in advance!!