Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++

Question: 1 / 565

What is crucial for the proper functioning of chained expressions like a=b=c?

Using a constructor

Returning a constant reference

Returning a new object each time

Returning a non-const reference

Chained expressions involve multiple assignments within a single statement. In order for these expressions to function properly, each assignment must have a valid and usable value to be assigned to the next assignment. Returning a non-const reference allows for the value to be passed on and used in subsequent assignments without creating a new object each time. This reduces the chances of errors occurring and ensures that the expression can be evaluated successfully. Options A, B, and C do not provide a valid and usable value for the next assignment, making them incorrect choices for the proper functioning of chained expressions.

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