drawpoly example in c

Header file:

    graphics.h

Synopsis:

     void drawpoly(int num, int *points);

     num - number of points

     *points - pointer to an array of intergers(num X 2) and each 

                    pair of points gives a coordinate(x,y) of polygon

Description:

      drawpoly() draws a polygon using the given points.

drawpoly function in c graphics

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  #include <graphics.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <conio.h>
  #include <dos.h>

  int main(void) {
        /* request auto detection */
        int graphicDriver = DETECT, graphicMode;
        int err, poly[12];

        /* initialize graphics and local variables */
        initgraph(&graphicDriver,
                &graphicMode, "C:/TURBOC3/BGI");

        /* read result of initialization */
        err = graphresult();
        if (err != grOk) {
                /* an error occurred */
                printf("Graphic Error: %s\n",
                                grapherrormsg(err));
                return 0;
        }

        /* 1st coordinate of the polygon */
        poly[0] = getmaxx() / 2;
        poly[1] = 0;

        /* 2nd coordinate of the polygon */
        poly[2] = (getmaxx() / 2) - 200;
        poly[3] = getmaxy() - 100;

        /* 3rd coordinate of the polygon */
        poly[4] = (getmaxx() / 2) + 200;
        poly[5] = 100;

        /* 4th coordinate of the polygon */

        poly[6] = (getmaxx() / 2) - 200;

        poly[7] = 100;

        /* 5th coordinate of the polygon */

        poly[8] = (getmaxx() / 2) + 200;

        poly[9] = getmaxy() - 100;

        /*

         * drawpoly doesn't automatically close the

         * polygon, so we need to close it explicitly

         */

        poly[10] = (getmaxx() / 2);

        poly[11] = 0;

        /* draw the polygon */

        drawpoly(6, poly);

        /* clean up */

        getch();

        closegraph();

        return 0;

  }

Output: (drawpoly built-in function in c graphics.h)

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