fibonacci01.cpp

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string.h>
#include <vector>
using namespace std;

int fibonacci(int row);

int main(void)
{
  int userValue = 0;
  cout<<"Enter desired row of fibonaci : ";
  cin>>userValue;
  cout<<"\n"<<fibonacci(userValue)<<endl;
  return 0;
}

int fibonacci(int row)
{
  int result = 0;
  int nmtwo = 0;
  int nmone = 0;
  if(row == 0)
    {
      cout<<"Finbonacci's row start at one"<<endl;
      //return 0;
      exit(0);
    }
  for (int i=0;i<=row;i++)
    {
      int tmp = nmtwo;
      nmtwo = nmone;
      nmone = nmone + tmp;
      if(i == row)
      {
         result = nmone;                                                                                                                 }
      if (i == 1)
    {
      nmone = 1;
      result = 0;
    }
      else if (i == 2)
    {
            nmtwo = 0;
        nmone = 1;
        result = 1;
         }
      }
  return result;
}

//sudo gcc main.cpp -lstdc++ -g -w -o fibonacci