Rectangle Area-Complete the Program

The Student CD contains a partially written program named AreaRectangle.cpp. Your job is to complete the program. When it is complete, the program will ask the user to enter the width and length of a rectangle, and then display the rectangle's area. The program calls the following functions, which have not been written:

• getLength - This function should ask the user to enter the rectangle's length, and then return that value as a double.

• getWidth - This function should ask the user to enter the rectangle's width, and then return that value as a double.

• getArea - This function should accept the rectangle's length and width as arguments, and return the rectangle's area. The area is calculated by multiplying the length by the width.

• displayData - This function should accept the rectangle length, width, and area as arguments, and display them in an appropriate message on the screen.