MATH.PAS type definitions

Depending upon whether or not MATH.PAS is compiled to do

floating point manipulations in hardware or software, the

routines will return different values.

float = either "real" or "double" depending upon the

status of the N option.

xfloat = either "real" or "extended" depending upon the

status of the N option.

The "float" type is expected to be the primary storage

mechanism for application programs. The "xfloat" type is

provided to maximize precision in expressions. There are only a

few functions where it is important to know the difference. They

are:

deg2dms -- returns "float" values through the DMS

arguments

modf -- returns a "float" value through one of its

arguments

poly -- expects the polynomial coefficients to be an

array of "float"

rad2dms -- returns "float" values through the DMS

arguments

remf -- returns a "float" value through one of its

arguments

(Because of Turbo Pascal's strong type-checking, you may run into

an occasional problem where you've declared a "real" or "double"

variable -- or you're redefined "float" in another unit -- and

can't pass the variable to one of the above routines. In those

cases, you should be able to do variable type-casting --

"math.float(x)" to bypass the type-checking. This should be done

with care.)

For programmer convenience, MATH.PAS defines a structured type

called "floatray" which is the largest array that can hold

elements of type "float" (as defined above). There is normally

no need to refer to "floatray" in application programs.