What is the purpose of tuples in C++?

In C++, a tuple is a data structure used to store multiple values of different types together, allowing you to conveniently pass and return multiple values without creating a specific structure or class.

The functions of tuples include:

1. As a return value for a function: when a function needs to return multiple values, you can use a tuple to package these values and return them as a single return value.
2. When a function requires multiple values as input, a tuple can be used to pass these values as a parameter.
3. As a container, tuples can store multiple values and allow access to each element using index or the get function.
4. As an alternative to structures: when you need to temporarily store some related but unnamed data, you can use tuples instead of defining a new structure or class.

In conclusion, tuples provide a convenient way to organize and manipulate multiple values of different types.