prog-0301

#include "stdafx.h"
using namespace std;
struct point { double x, y; };

int     average(int a, int b);
double  average(double a, double b);
point   average(point a, point b);

class Vector {
    double xStart, xEnd, yStart, yEnd;
public:
    Vector();
    Vector(double xs, double ys, double xe, double ye);
    ~Vector();
    Vector operator+(Vector& rOperand);
};

Vector::Vector()
    : xStart(0)
    , xEnd(0)
    , yStart(0)
    , yEnd(0)
{
}

Vector::Vector(double xs, double ys, double xe, double ye)
    : xStart(xs)
    , xEnd(ys)
    , yStart(xe)
    , yEnd(ye)
{

}

Vector::~Vector()
{
}

Vector Vector::operator+(Vector& rOperand)
{
    return Vector(xStart,xEnd + (rOperand.xEnd - rOperand.xStart),yStart, yEnd + (rOperand.yEnd - rOperand.yStart));
}


int _tmain(void)
{
    point p1 = { 1, 1 }, p2 = { 2, 2 }, p3;
    cout << average(2, 3) << endl;
    cout << average(2.0, 3.0) << endl;
    p3 = average(p1, p2);
    cout << p3.x << " " <<p3.y << endl;
    return 0;
}

int average(int a, int b)
{
    return (a + b) / 2;
}

double  average(double a, double b)
{
    return (a + b) / 2.0;
}
point average(point a, point b)
{
    point c;
    c.x = (a.x + b.x) / 2.0;
    c.y = (a.y + b.y) / 2.0;
    return c;
}