The volume of a cylinder is the product of the area of the base (PI * r * r) and the height. Write a program that accepts the radius and height from the user and invokes a function named volume which...

The volume of a cylinder is the product of the area of the base (PI * r * r) and the height. Write

a program that accepts the radius and height from the user and invokes a function named

volume which in turn invokes a function named area.

Write a program that draws a rectangle using the draw_rectangle function. This function

invokes the draw_line function for drawing the horizontal sides. Both functions need an

additional argument that determines the character used for drawing.