point.cpp

#include <stdio.h>
#include <math.h>
#include "point.h"

Point* mkpt(int x, int y) {
        Point *p = new Point();

        p->xval = x;
        p->yval = y;

        return p;
}

double dist(Point a, Point b) {
        int xd = a.xval - b.xval;
        int yd = a.yval - b.yval;
        return sqrt(xd*xd + yd*yd);
}

Point *add(Point *a, Point *b)
{
        return mkpt(a->xval + b->xval, a->yval + b->yval);
}
Point *sub(Point a, Point b)
{
        return mkpt(a.xval - b.xval, a.yval - b.yval);
}

void move(Point *p, double a, double b)
{
        p->xval += a;
        p->yval += b;
}

void print(Point p)
{
        printf("(%d,%d)", p.xval, p.yval);
}

void prline(Point x, char *op, Point y, Point z)
{
        print(x);
        printf(" %s ", op);
        print(y);
        printf(" = ");
        print(z);
        printf("\n");
}