How to make it look like falling snow? - c++

Question

I have tried to make it look like falling snow but snow is coming from everywhere and I have to make falling snow from library graphics.h. I don't know how to make it move but I already add x and y. For int speed I don't know to use it I see from other code which is from movement of the ball. This code is for my assignment, can you guys help me?
#include <graphics.h>
class Snow
{
private:
int x,y;
int color;
int speed;
public:
Snow(int _x, int _y, int _color, int _speed)
{
x=_x;
y=_y;
color=_color;
speed=_speed;
}
int getColor()
{
return color;
}
int getSpeed()
{
return speed;
}
int getX()
{
return x;
}
int getY()
{
return y;
}
void setX(int value)
{
//x=rand();
x=value;
}
void setY (int value)
{
//y=rand();
y=value;
}
void setColor(int value)
{
color=value;
}
void setSpeed(int value)
{
speed=value;
}
void draw()
{
setcolor(color);
setfillstyle(SOLID_FILL,color);
fillellipse(x,y,2,2);
}
void undraw()
{
setcolor(BLACK);
fillellipse(x,y,2,2);
}
void move()
{
undraw();
x=rand() % getmaxwidth();
y=rand() % getmaxheight();
draw();
}
};
int main()
{
int screenWidth = getmaxwidth();
int screenHeight = getmaxheight();
initwindow(screenWidth, screenHeight, "Snowy day");
Snow p1(0,0,WHITE,10);
while (!kbhit())
{
delay(100);
p1.move();
}
return 0;
}

Answer 1

You should use speed in move function. For example:
void move() {
undraw();
x=rand() % getmaxwidth();
// fall
y += speed;
draw();
}