why class is called as reference data type
C++ classes Instances of a class data type are known as objects and can contain member variables, constants, member functions, and overloaded operators defined by the programmer.
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IEEE 754-1985 The leading 1 bit is omitted since all numbers except zero start with a leading 1; the leading 1 is implicit and doesn't actually need to be stored which gives an extra bit of precision for "free."
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