What are some use cases of operator overloading in C++?

There are many applications of C++ operator overloading, mainly including the following aspects:

1. Overloading operators in custom classes: Defining operations between objects of custom classes by overloading operators, enabling them to perform operations like built-in types.
2. Changing operators: Operator overloading can change the behavior of certain operators to adapt to specific requirements. For example, you can change an object’s output behavior by overloading the output operator.
3. Operator overloading for container classes: By overloading the operators of container classes, the functionality of the container class can be extended, making it more convenient and flexible. For example, overloading the [] operator of a container class allows for accessing elements by index.
4. Chained operator calls: Operator overloading allows operators to be chained together, simplifying code writing and understanding. For example, by overloading the += operator, multiple addition operations can be written as a += b += c.
5. Operator overloading for iterators: By overloading the operators of an iterator, you can achieve traversal operations on containers. For example, overloading the ++ operator allows the iterator to be incremented.

In conclusion, C++ operator overloading can enhance the readability and maintainability of code, making it more flexible and convenient. Depending on the specific requirements and circumstances, the appropriate operators can be selected for overloading.