fibonacci.cpp

#include <iostream>

int main(int argc, const char * argv[]) {
    int n = 0;
    std::cout << "Enter n:";
    std::cin >> n;
    
    int n1 = 0, n2 = 1, sum = 1;
    while (sum < n)
    {
        n2 = n1;
        n1 = sum;
        std::cout << sum << " ";
        sum = n2 + n1;
    }
    
    std::cout << std::endl;
    return 0;
}