Scalling

#include <stdio.h>
#include <conio.h>
#include <graphics.h>
#include <process.h>
#include <math.h>

int x1, y1, x2, y2, x3, y3;
void draw();
void scale();

void main()
{
    int gd = DETECT, gm;
    int c;
    initgraph(&gd, &gm, "C:\\TURBOC3\\BGI");

    printf("Enter the 1st point for the triangle:");
    scanf("%d%d", &x1, &y1);
    printf("Enter the 2nd point for the triangle:");
    scanf("%d%d", &x2, &y2);
    printf("Enter the 3rd point for the triangle:");
    scanf("%d%d", &x3, &y3);
    draw();
    scale();
}



void draw()
{
    line(x1, y1, x2, y2);
    line(x2, y2, x3, y3);
    line(x3, y3, x1, y1);
}



void scale()
{
    int a1, a2, a3, b1, b2, b3;
    int x, y;
    int mx, my;

    printf("Enter the scaling factors (x y): ");
    scanf("%d%d", &x, &y);

    mx = (x1 + x2 + x3) / 3;
    my = (y1 + y2 + y3) / 3;

    cleardevice();

    a1 = mx + (x1 - mx) * x;
    b1 = my + (y1 - my) * y;

    a2 = mx + (x2 - mx) * x;
    b2 = my + (y2 - my) * y;

    a3 = mx + (x3 - mx) * x;
    b3 = my + (y3 - my) * y;

    line(a1, b1, a2, b2);
    line(a2, b2, a3, b3);
    line(a3, b3, a1, b1);

    draw();
    getch();
}