fibo.cpp

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// fibo.cpp
// demonstrates WHILE loops using fibonacci series
#include <iostream>
using namespace std;

int main()
   {                           //largest unsigned long
   const unsigned long limit = 4294967295;
   unsigned long next=0;       //next-to-last term
   unsigned long last=1;       //last term

   while( next < limit / 2 )   //don't let results get too big
      {
      cout << last << "  ";    //display last term
      long sum = next + last;  //add last two terms
      next = last;             //variables move forward
      last = sum;              //   in the series
      }
   cout << endl;
   return 0;
   }