int calcFibonacci2()
{
//load
cout << "Getting data..." << endl;
deque<string> data;
unsigned long long x = getCount("Files/Fibonacci2/");
string s = getLine("Files/Fibonacci2/",x-2);
if(s=="")
{
cout << "Error! Calculation was not executed." << endl;
return -2;
}
data.push_back(s);
s = getLine("Files/Fibonacci2/",x-1);
if(s=="")
{
cout << "Error! Calculation was not executed." << endl;
return -2;
}
data.push_back(s);
//calculate
unsigned long siz = 2;
cout << "Calculating..." << endl;
while(stop.test_and_set(memory_order_acquire))
{
Integer a = createFromText(data.at(siz-2),2305843009213693952); //base 2^61
Integer b = createFromText(data.at(siz-1),2305843009213693952); //base 2^61
Integer z = a+b;
string z2 = z.textValue();
data.push_back(z2);
siz++;
}
//save
cout << "Saving data..." << endl;
int o = printLines("Files/Fibonacci2/",data,2,data.size()-2);
if(o==-3)
{
cout << "Big error!! You should reset all files to initial setup before continuing." << endl;
return -5;
}
else if(o!=0)
{
cout << "Error! Calculated data might not have been saved." << endl;
return -3;
}
cout << "Fibonacci process was successful. I found " << (data.size()-2) << " fibonacci numbers("
<< (x+1) << "-" << (x+data.size()-2) << ")." << endl;
stop.clear();
return 0;
}
