Final answer:
The 'setw' manipulator is used in C++ to set the width of the next I/O field. The default justification is right, not center as mentioned. It requires the 'iomanip' library and can be combined with 'std::left' or 'std::right' for different justifications.
Step-by-step explanation:
The manipulator setw is used in C++ programming and is part of the iomanip library. When you write std::setw(n), it sets the width of the next input/output field to 'n' characters. The content is by default right-justified within this field; to center justify or left justify, you can use additional manipulators such as std::left or std::right. For example, std::cout << std::setw(10) << std::left << 123; will print '123' left-justified in a field of width 10.
To correct the initial statement, the default justification for the setw manipulator in C++ is indeed right, not center. If you wish to center text, this would require a more customized approach, as the standard library does not provide a direct manipulator for center justification.
The question is incomplete the manipulator setw formats the output of an expression in a specific number of columns; the default output is center justified is........./;