Question

Dis advantages and advantages of operator overloading in cpp

Answer 1

There is no real downside to it other than losing short-circuiting on logical operators, at least in C++.

As long as it follows the expected behavior of the operator, overloads don't cause any problems. Operator overloading is just syntatic sugar for a function call. There is nothing magical about it. It just makes some code more idiomatic.
Done properly (by both the language and the programmer), it makes the language and your code more consistent, expressive and reusable.

Done inconsistently by the language, it adds unnecessary complications to the syntax and arbitrary constraints to the abstractions. A language should be entirely consistent in this or not do operator overloading at all.

Done badly by the developer, it can make code misleading and unpredictable.