everyone.Please help in knowing the difference between the Top down approach languages(eg.COBOL) and Bottom up approach languages(eg.C++) because for every language the control comes from the top.Please help me from the above confusion.
In the top-down model an overview of the system is formulated, without going into detail for any part of it. Each part of the system is then refined by designing it in more detail. Each new part may then be refined again, defining it in yet more detail until the entire specification is detailed enough to validate the model.
By contrast in bottom-up design individual parts of the system are specified in detail. The parts are then linked together to form larger components, which are in turn linked until a complete system is formed.