8.1.13.1 Using cout - flags

#include "stdafx.h"
#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main()
{
	double value;
	cin >> value;

	//your code

	cout << value << endl;
	cout.setf(ios::showpos | ios::showpoint);
	cout << value << endl;
	cout.unsetf(ios::showpos);
	cout << value << endl;
	cout.unsetf(ios::showpoint);
	cout.setf(ios::showpos);
	cout << value << endl;

	system("pause");
	return 0;
}