polygon try 1

#include "primlib.h"
#include <stdlib.h>
#define PI 3.141592653589
# define angle_of_rotation M_PI/2
#define verticles 5


int min (int a, int b)
{
    if(a<b)
        return a;
    return b;
}
int main(int argc, char* argv[])
{
    int i ;

    if(initGraph())
    {

        exit(3);
    }
    /* clear screen */

    /*
    filledRect(0, 0, screenWidth() - 1, screenHeight() - 1, BLACK);
    filledCircle(screenWidth() / 2, screenHeight() / 2, 100, YELLOW);
    updateScreen();
    getkey();*/

   // filledRect(0, 0, screenWidth() - 1, screenHeight() - 1, BLACK);
    //filledCircle(screenWidth() / 2, screenHeight() / 2, 100, YELLOW);
    //updateScreen();
    //getkey();

    /*for ( i = 100; i < 500; i = i + 10)
    {

       filledCircle(screenWidth() / 2, screenHeight() / 2, i, YELLOW);
        updateScreen();
        SDL_Delay(10);

        if (isKeyDown(SDLK_ESCAPE) == 1)
        {
            break;
        }*/

    int radious = 10;
    int rotation = 0 ;
    double polygonAngle = (2*M_PI)/ verticles;


    double origin_x = screenWidth() / 2;
    double origin_y = screenHeight() / 2;

    double start_x;
    double start_y;

    double stop_x;
    double stop_y;
    while(1)
    {
    //----------------------creating frame----------
    //clear screen
    filledRect(0, 0, screenWidth() - 1, screenHeight() - 1, BLACK);

    radious = (radious + 1) % (int)(min(screenWidth(), screenHeight())/2);
    rotation = (rotation + (int)angle_of_rotation );


    for (i = 0; i < verticles;  i++)
    {
        start_x = origin_x + radious * cos(polygonAngle* i + rotation);
        start_y = origin_y + radious * sin(polygonAngle* i + rotation);
        stop_x = origin_x + radious * cos(polygonAngle* (i + 1) + rotation);
        stop_y = origin_y + radious * sin(polygonAngle* (i + 1) + rotation);

        line(start_x, start_y, stop_x , stop_y, BLUE);

    }


    updateScreen();
    SDL_Delay(40);



     if (isKeyDown(SDLK_ESCAPE) == 1)
        {
            break;
        }

     // if(pollkey() != -1)
      // break;
    }
    updateScreen();
    //SDL_Delay(40);

    return 0;
}