Float--Floating Point Number

Class Float provides an NIH Class Library object to hold a floating point number. This is useful, for example, if one wishes to associate a key object with a floating point number and store it in a Dictionary. Arithmetic operations on Float objects have not been provided to discourage their use, due to their relative inefficiency.

CONSTRUCTORS

Float(double value =0): Constructs an instance of class Float with the value value.
Float(istream& strm): Constructs an instance of class Float with the value read from the input stream strm with istream::operator>>().

ACCESSING FLOATS

double value() const: Returns the value of this Float.
double value(double newValue): Sets this Float to newValue and returns newValue.

SEARCHING

virtual unsigned hash() const: Returns a number suitable for use as a hash table probe.

COMPARING FLOATS

virtual int compare(const Object& ob) const: Compares this Float with the argument object ob, which must also be an instance of class Float. Returns a negative result if this Float is less than ob, zero if this Float equals ob, and a positive result if this Float is greater than ob.

TESTING FLOATS

virtual bool isEqual(const Object& ob) const: Returns YES if ob is of species Float and equals this Float.

COPYING FLOATS

virtual void deepenShallowCopy(): This function is a no-op for class Float.

READING AND PRINTING FLOATS

virtual void printOn(ostream& strm =cout) const: Prints this Float on output stream strm using ostream::operator<<().
virtual void scanFrom(istream& strm): Assigns the value of this Float to the value obtained by reading the input stream strm with istream::operator>>().