Matrix elements are displayed in fields with "width"
characters, and "dec" digits to the right of the decimal
place. These parameters may be set using
Setwid() and
Setdec(). Two other functions are
provided for finding the current width and dec.
Getwid() and
Getdec() return integers for
width and dec. You should rarely require the last two
functions. They store width and dec in static variables.
They are also called by other functions needing these
values.