[cobras2]

I'm having trouble with the first part of my fibonacci program. I was able to write a function to actually calculate the numbers, but we must write the numbers into a file (and on the screen) in rows of 4. The way I wrote it works, but I don't think is 'correct'. Also, we have to account for overflow, and I have no clue how to do that is this instance. We are not allowed to use arrays.

#include <iostream>
#include <fstream>
using namespace std;


int main()
 {

char end_program;

//--------------------------   Functions   -----------------------------//
int fibonacci(int number_par);


///-----------------------   Main Program   ----------------------------//
do
{

//------------  Step 1 - Generate Sequence & Write to File   -----------//
	ofstream out_stream;
	ifstream in_stream;
	
	out_stream.open("Fibonacci.dat");
	
	// If File Opening Fails //
	if (out_stream.fail())
	{
		cout<<"Output file Fibonacci opening failed.\n";
		exit(1);
	}
	
	int number;
	int Fib=0;
	unsigned N;

	cout<<"Please enter a positive integer.\n";
	cin>>number;
do
	{
		if (cin.fail() || number <= 0)
		{
			cout<<"Invalid Input";
			cin.clear();
			cin.ignore(1000,'\n');
			continue;
		}
		break;
	}while (true);


	N = 1;
	cout<<"You entered: "<<number<<endl;  
	while (N<=number) 
	{	
	
	//***********  Account for Scripting Error  ************//
		 
	 //***********  Write in rows of 4  **************//
		//Determine how many rows there will be
		int row;
		{
		if(number%4==0)
			row=number/4;
		else
			row=(number/4)+1;
		}
		//Write in rows
		for (int b=1; b<=row;)
		{
			for(int n=1; n<=4;n++)
			{
				Fib = fibonacci(N);

				out_stream<<Fib<<" ";
				cout<<Fib<<" ";
				
				N++;
				if (N > number)
					break;
			}
			out_stream<<endl;
			cout<<endl;
			b++;
		}

	//***********  Write file on screen  **********//

		 
	}
	
	//**************  Count numbers  *************//

out_stream.close();

cout<<"Would you like to quit? Press Q to quit, or any other key to continue"<<endl;
cin>>end_program;
 } while (end_program!='q' && end_program!='Q');

return (0);
			  }


 //------------------------  Function definitions  ----------------------
 
 int fibonacci(int number_par)
 {
 
	if(number_par<=1)
	   return (number_par);

	else
	   return (fibonacci(number_par-1)+fibonacci(number_par-2));
	   
 }

[AmitTheInfinity]

I think you made it bit complex...

for (int b=1; b<=number;b++)
        {            
                Fib = fibonacci(B)/>;

                out_stream<<Fib<<"\t";
                cout<<Fib<<"\t";                
        }
        out_stream<<endl;
        cout<<endl;        
        }

I consider that number is number of values from Fibonacci series. so if number is five, you print.
1 1 2 3
5

I hope this will help you.