How is the usage of c++ stringstream?

In C++, stringstream is a string-based stream class that can convert strings into various types of data and allows for easy input and output operations.

The usage of stringstream is as follows:

1. Include the library .
2. A standard string stream called ss.
3. ss prints “Hello World” on the screen.
4. Assign the value from the stringstream `ss` to the string variable `str`.
5. Read an integer from the stringstream and store it in the variable ‘num.’
6. Insert the number 123 into the variable ss.
7. Read the value from the input stream into the integer variable “num”.

Stringstream is convenient for converting data types and performing read/write operations on strings, making it especially useful in scenarios that involve handling strings.