In C, is it possible to create an array of pointers to structures?
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ACorrect — you can have arrays where each element is a pointer to a structure
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BIncorrect — arrays cannot hold pointers to structures
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CPossible only if the structure has no pointer members
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DAllowed solely at file scope, not inside functions
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EValid only when the array length is one
Answer
Correct Answer: Correct — you can have arrays where each element is a pointer to a structure
Explanation
Introduction / Context:Arrays and pointers are core to C programming. Many real programs manage collections of dynamically allocated structures using arrays of pointers.
Given Data / Assumptions:
- We have a user-defined structure type.
- We may need multiple instances managed via pointers.
Concept / Approach:C permits arrays of any object type, including pointer types. Therefore, an array of struct pointers is entirely valid and useful when objects are dynamically allocated and shared.
Step-by-Step Solution:1) Declare struct Box { int w, h; };2) Declare struct Box *arr[10]; — an array of 10 pointers to Box.3) Allocate each element separately (e.g., malloc) and assign to arr[i].4) Access via arr[i]->w, arr[i]->h.
Verification / Alternative check:Compile and run a small program that fills and reads from an array of struct pointers; it works portably.
Why Other Options Are Wrong:Option B: Arrays can hold pointers. There is no such restriction.Option C/D/E: These impose non-existent limitations on member makeup, scope, or length.
Common Pitfalls:Forgetting to allocate or free each pointed-to object, and mixing up arr[i].member versus arr[i]->member.
Final Answer:Correct — arrays of pointers to structures are fully supported.