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Questions and Answers
What is the type of the expression A in the given code?
What is the type of each element in the array A?
Why is the option 'const char *' incorrect?
What is the index of the element referred to by the expression A?
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What is the purpose of the #include statement in the code?
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What is the significance of zero-based array indices in C++?
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What is the main difference between the std::string type and the C-style string?
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Why is the option 'char[]' incorrect?
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Study Notes
Declaring an Array of std::string
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std::string A[] = {"what", "is", "the", "size", "of", "this", "array?"};declares an array of std::string, where each element is of type std::string.
Understanding the Type of Expression A
- The expression A refers to the fourth element of the array A (since array indices in C++ are zero-based).
- Given the type of A is an array of std::string, the type of A is std::string.
Analysis of Options
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const char*: refers to a pointer to a constant character array, which is not the case here since the elements of A are std::string objects, not C-style strings. -
std::string: each element in the array A is of type std::string, and hence A is of type std::string. -
char[]: suggests an array of characters, which is also not the case since the elements of A are std::string objects, not character arrays. -
none of the other choices: this option is incorrect because we have already identified the correct choice as std::string.
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Description
Determine the type of the expression A in the given C++ code. Learn how to break down the code and identify the type of elements within the array.
