Using Packages

Importing Packages

WITH makes package contents available

        package PLANE is         -- specification
           ...
        end PLANE;



        with TEXT_IO, PLANE;     -- user program
        procedure lab6 is
           ...
        end lab6;



        with TEXT_IO;            -- body
        package body PLANE is
           ...
        end PLANE;

Using Packages

to use a package element:

	package.element

example:

	TEXT_IO.PUT ("abc");
	TEXT_IO.NEW_LINE;
	int_io.PUT (mark, width => 1);
        PLANIMETRY.area_circle (2.0);
        PLANE.get_coordinates (X1,Y1);

USE (in declarations) allows package name to be omitted

	use TEXT_IO,int_io;
	...
	PUT ("abc");
	NEW_LINE;
	PUT (mark, width => 1);
        PLANIMETRY.area_circle (2.0);
        PLANE.get_coordinates (X1,Y1);

Best to include package names (except for I/O)