FINAL_REVIEW.pdf

Week 1 Question 1 What is the type of the expression A ? string A[] = {“what”, “is”, “the”, “size”, “of”, “this”, “array?”}; A. const char * B. std::string C. char[] D. none of the other choices E. char Reason To determine the type of the expression A , let's break down the prov...

Week 1 Question 1 What is the type of the expression A ? string A[] = {“what”, “is”, “the”, “size”, “of”, “this”, “array?”}; A. const char * B. std::string C. char[] D. none of the other choices E. char Reason To determine the type of the expression A , let's break down the provided code and understand the type of the elements within the array.为了确定表达式 A 的类型，让我们分 解提供的代码并了解数组中元素的类型。 #include std::string A[] = {"what", "is", "the", "size", "of", "this", "array?"}; Here, A is declared as an array of std::string. This means that each element in the array A is of type std::string. 这⾥， A 被声明为 std::string 的数组。这意味着数组 A 中的每个元素都是 std::string 类型。 Now, let's look at the 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. 现在，让我们看⼀下表达式 A 。表达式 A 引⽤数组 A 的第四个元素（因为 C++ 中的数 组索引是从零开始的）。假设 A 的类型是 std::string 的数组，则 A 的类型是 std::string 。 Analysis of the Options 选项分析 1. const char * : This option suggests 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. const char * ：此选项建议指向常量字符数组的指针，但这⾥的情况并⾮如此，因为 A 的元 素是 std::string 对象，⽽不是 C ⻛格的对象字符串。 1  2. std::string : This is the correct answer. Each element in the array A is of type std::string , and hence A is of type std::string. std::string ：这是正确答 案。数组 A 中的每个元素都是 std::string 类型，因此 A 是 std::string 类型。 3. char[] : This option suggests an array of characters, which is also not the case since the elements of A are std::string objects, not character arrays. char[] ：此选项建议使⽤ 字符数组，但情况并⾮如此，因为 A 的元素是 std::string 对象，⽽不是字符数组。 4. none of the other choices : This option is incorrect because we have already identified the correct choice as std::string. none of the other choices ：此选项不 正确，因为我们已经将正确的选择确定为 std::string 。 5. char : This option suggests a single character type, which is incorrect because A is a std::string , not a single character. char ：此选项建议使⽤单个字符类型，这是不正确 的，因为 A 是 std::string ，⽽不是单个字符。 Thus, the correct answer is indeed std::string.因此，正确答案确实是 std::string 。 Question 2 SELECT ALL statements that are true of the following program. Consider the following program that declares a global static array named A of type double. Select ALL statements that are true about this program. constexpr int N = 10; double A[N]; void F() { cout