Streams of strings.

What this C++ streams question tests

This is a medium-difficulty question about C++ input and output streams. It requires you to trace through code that uses stream operators and understand how the standard library handles string data in the context of stream operations.

To answer correctly, you need to be familiar with how streams work in C++, including the semantics of the << and >> operators, stream state, and the behaviour of string extraction and insertion. These concepts are foundational for writing correct I/O code and matter in any environment where data flows through your program—whether in trading systems, data processors, or general C++ applications.

• Stream operators and overloading
• String extraction and whitespace handling
• Stream state and error conditions