Explanation: In the above program, the object c1 itself acts as a source and destination object.
The reference of object is passed to operator function. The object c is a reference object of c1.
The values of object c are replaced by itself by applying negation.
10.8 OVERLOADING ASSIGNMENT OPERATOR (=)
In this section, data members of one object are initialized with some values, and the same values
are assigned to another object with assignment operator. Assignment operator can be o ...
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