Friend Function That Builds a New Object

Create a class Box with a private int volume set by its constructor, plus a public int getVolume() const. Write a friend function Box mergeBoxes(const Box& a, const Box& b) that returns a NEW Box whose volume is the sum of the two boxes' volumes.

The friend function needs direct access to the private volume of both boxes.

Do NOT write a main function.

Expected Output:

30↵
12↵

= newline. The output ends with a newline — print one after the last line.

Hints3 available

Topics:

ClassesFriend Functions

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