#include <stdio.h>
#include <math.h>
#include "winbgi2.h"
#include <stdlib.h>
#include <time.h>
#define N (10)
#define Lx (500)
#define Ly (500)

int i;
void init (double *x, double *y, double *vx, double *vy);
void display (double *x, double *y);

void main()
{
    srand(time(NULL));
    graphics (Lx,Ly);
    double x[N], y[N];
    double vx[N], vy[N];
    init (x, y, vx, vy);
    display (x, y);
}

void init(double *x, double *y, double *vx, double *vy)

{
    int predkosc = 1;
    int max_x = Lx;
    int max_y = Ly;
    int L_x = max_x+1;
    int L_y = max_y+1;

    for (i=0; i<N; i++)
    {
        double angle = (double)(rand() % 360) * PI / 180.0;
        x[i]=rand()%L_x;
        y[i]=rand()%L_y;
        vx[i]=predkosc * cos(angle);
        vy[i]=predkosc * sin(angle);
    }
}

void display(double *x,double*y)
{
    for(i=0;i<N;i++)
    {
        circle (x[i], y[i], 10);
    }
}