paste

#include "stdafx.h"
#include <Windows.h>
#include <iostream>
using namespace std;

int n;

class Range
{
private:
    double a, b;
public:
    Range()
    {
        cin >> a;
        cin >> b;
    }
    double getLenght()
    {
        return b - a;
    }
    bool isIntersect(const Range& r)
    {}
    float getIntersection(const Range& r)
    {

    }
    float getUnion(const Range& r)
    {

    }
};

Range *arr;
//Range arr[1]; //my shitty crutch

void in()
{

}
void out()
{
    //for (int i = 0; i < n-1; i++)
    //{
    double c = arr[0].getLenght();
    cout << c;
    //}
}

void controller()
{
    Range *arr = new Range[n];
    in();
    out();
    delete[] arr;
}

int main()
{
    cin >> n;
    controller();
    system("pause");
    return 0;
}