What is the value of std::rank<int[2][3][4]>::value in C++?
Options
- A. 1
- B. 2
- C. 3
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
C. 3
Detailed Explanation
Answer: (C) 3
The std::rank type trait returns the number of dimensions of an array type.
The type int[2][3][4] contains three array dimensions: the first dimension is 2, the second is 3, and the third is 4.
Therefore, std::rank<int[2][3][4]>::value is 3.
The values 2, 3 and 4 represent the extents of the dimensions; they do not represent the rank.