fibonacci print out issue in c++ - c++

Question

I was trying to run the fib.exe by using this command "fib 12" so it can directly print out the result in this format:
http://pastebin.com/ytR92i8f
But with my code compiled, for instance, if I use 12 to test my program, it won' t read any number and show the result in this command "fib xx" but it will run the program and let you type the number you want in the next line and then print out the result...
I have attached the link to my main.cpp below as reference.
main.cpp : http://pastebin.com/fhUAkNQR
Because main.c can not be modify so I can only use one function to get it works.
Right now I already have the correct result.
void fibonacci(int max)
{
do
{
std::cin >> max;
}
while(max < 2 && max > 46);
std::cout << " Fibonacci Fibonacci" << std::endl;
std::cout << " N number quotient" << std::endl;
std::cout << "-------------------------------------" << std::endl;
std::cout << " 0 0 N/A" << std::endl;
std::cout << " 1 1 N/A" << std::endl;
int count = max;
int fib1 = 0, fib2 = 1;
for (int i = 2; i <= count; i++)
{
int next = fib1 + fib2;
// Add statements to print here...
std::cout << std::setw(2) << i;
std::cout << std::setw(14) << next;
std::cout << std::setw(21) << std::setprecision(17) << std::showpoint;
std::cout << static_cast<double>(next) / fib2 << std::endl;
std::cout.unsetf(std::ios_base::showpoint);
fib1 = fib2;
fib2 = next;
}
return;
}

Answer 1

Here's and example. Problems like the Fibonacci are better dealt with recursion. I see that with your do while loops you are trying to use some sort of recursion but it's not really working
int fibonacci(int x)
{
if (x == 0)
return 0;
if (x == 1)
return 1;
return fibonacci(x-1)+fib(x-2);
}
This basically does all you've typed in your main, just supply x and enjoy. Recursion is a difficult concept but once you've got the idea it can preform very effectively but it's pretty limited in my opinion.