Помогите с кодом симулятор солнечной системой? (язык Си)

 #include  
#include  
#include  
#include   
#define PI 3.14159265359 
#define PLANETS_COUNT 9  
void draw_planet(int cx, int cy, int x, int y, float angle, int fg, int bg);  
int main(void) { 
float x[PLANETS_COUNT], y[PLANETS_COUNT], angle[PLANETS_COUNT], step[PLANETS_COUNT]; 
int planets; char buf[80]; 
  int gdriver = DETECT, gmode, errorcode; 
    initgraph(&gdriver, &gmode, ""); 
        errorcode = graphresult(); 
            if(errorcode != grOk) return -1; 
 
   

 for(planets=0; planets        if(planets > 0) { x[planets] = x[planets-1]+15; y[planets]=y[planets-1]+15; }  
            else { x[planets] = 40; y[planets]=40; }  
    }  
  for(planets=0; planets    { angle[planets] = rand() % 50; step[planets] = 1 + rand() %4; }  
  
setcolor(WHITE);  
setfillstyle(SOLID_FILL, YELLOW);  
circle(350, 240, 20);  
floodfill(352, 242, WHITE);   
 

 while(!kbhit())   
{   
for(planets=0; planetsdraw_planet(350, 240, x[planets], y[planets], angle[planets], BLACK, BLACK);   
angle[planets] += step[planets];   
if(angle[planets] >= 359) angle[planets] = 0;   
draw_planet(350, 240, x[planets], y[planets], angle[planets], WHITE, BLUE);   
sprintf(buf, "%d %f", planets, angle[planets]);   
outtextxy(10, 10+(planets*15),buf);   
}}   
getch(); closegraph();   
return 0;}    
void draw_planet(int cx, int cy, int x, int y, float angle, int fg, int bg) {   
float nx, ny;   
nx = (x * cos(angle*(PI/180))) - (y * sin(angle*(PI/180)));   
ny = (x * cos(angle*(PI/180))) + (y * sin(angle*(PI/180)));   
setcolor(fg);   
circle(cx + nx, cy + ny, 5);   
setfillstyle(SOLID_FILL, bg);   
floodfill(cx+2+nx, cy+2+ny, fg);}