Physics component - lolcopter

//base speed = .03
 
enum direction{LEFT=1, RIGHT=2, UP=3, DOWN=4};
float v_x=.03, v_y=.03;
float move_x(float deltaX, float deltaTime, int direction) { //deltaX = current speed
 if (direction == RIGHT) {
  float A = v_x/deltaTime;
  v_x+=A;
  return(v_x);
 }
 if (direction == LEFT) {
  float A = v_x-(v_x/deltaTime);
  v_x+=A;
  return(v_x);
 }
}
float move_y(float deltaY, float deltaTime, int direction) { //deltaY = current speed
 if (direction == RIGHT) {
  float A = v_y/deltaTime;
  v_y+=A;
  return(v_y);
 }
 if (direction == LEFT) {
  float A = v_y-(v_y/deltaTime);
  v_y+=A;
  return(v_y);
 }
}
///////**---USAGE---**///////
if (you press 'a') {
 myX += move_x(v_x, 5, RIGHT);
 glutSetWindow(1);
 Reshape(winHeight, winWidth);
 glutPostRedisplay();
}
//////////////////////////////