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Tuesday 10 September 2013

cleardevice example in C

Header file:
    graphics.h

Synopsis:
     void cleardevice (void);

Description:
      cleardevice() clears the whole graphic screen and resets the current position to (0,0).


cleardevice function in c graphics



  #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, x, y;

        /* 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;
        }

        x = getmaxx() / 2;
        y = getmaxy() / 2;

        /* output a message to the screen */
        circle(x, y, 100);
        delay(700);

        setcolor(10);
        settextjustify(CENTER_TEXT, CENTER_TEXT);

        /* prints CLEAR SCREEN at the given position(x, y) */
        outtextxy(x, y, "CLEAR SCREEN");
        delay(700);

        /* clears the screen */
        cleardevice();
        getch();

        /* deallocates memory allocated for graphic screen */
        closegraph();
        return 0;
  }




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


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