Factor Program
#include <iostream.h>
#include <math.h>
#include <fstream.h>
#include <iomanip.h>
#include <limits.h>
#include <float.h>

	long double count;
	long double num;
	long double div;
	long double x;
	long double output;


void getnum()
{
	long double x_getnum = 0.0;
	long double input_getnum = 0.0;       //can use pow(x, y)=x^Y
	long double output_getnum = 1.0;

	cout << "2 to what power?" << endl;
	cin >> input_getnum;
	output_getnum = pow(2, input_getnum);
	cout << output_getnum;
	num = output_getnum;
}

void factor()
{
	ofstream outf("prime.txt");

	long double max_factor;
	max_factor = (num + 1.0) / 2.0;  			//will alway be even

	long double test, test2, test3;

	for(x=1.0 ; x<=max_factor ; x=x+2.0)
	{
		output = (num / x);			//x.xxx
		test2= floor(output);
		//test = int (output);   	//x.xxx=x
		//test2 = double (test);   //x=x.0
		test3 = output - test2; //equals zero if x is a factor

		if (test3 == 0.0)
		{
			cout << x << endl;
			outf << x << endl;
			num = output;
			max_factor = ((output +1.0)/2.0);
			x = 1.0;
		}
	}
	cout << num << endl;
	outf << num << endl;
	outf.close();
}



void main(void)
{
	getnum();
	num = num - 1.0;
	cout << endl << "Factoring:                  "<< num << endl;
	factor();
}