int main int argc char argv int double çíà åíèå âûðàæåíèÿ printf Pleas

int main(int argc, char *argv[])
{
  int p,q;
  double f;//çíà÷åíèå âûðàæåíèÿ
  printf("Please input p,q:\n");//ââåäåì öåëûå çíà÷åíèÿ p,q
  scanf("%d",&p);
  scanf("%d",&q);
  f = q>=100 ?((p+q)/(2.*q)) : (q>0 && p<20) ? (p-2*q) : (p-3*q);//ñ÷èòàåì âûðàæåíèå ñ ó÷åòîì ïîñòàâëåííûõ óñëîâèé
  printf("f=%lf\n",f);//âûâîäèì çíà÷åíèå  
  system("PAUSE");	
  return 0;
}