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C allows an array index of both positive and negative integer? - Answers

Yes, see the C99 ISO standard §6.5.2.1/2. Assuming a pointer "a" into an allocated array, a[-1] is equivalent to *(a - 1). Naturally, if (a - 1) points to an unallocated memory location, you get undefined behavior.



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C allows an array index of both positive and negative integer? - Answers

https://math.answers.com/math-and-arithmetic/C_allows_an_array_index_of_both_positive_and_negative_integer

Yes, see the C99 ISO standard §6.5.2.1/2. Assuming a pointer "a" into an allocated array, a[-1] is equivalent to *(a - 1). Naturally, if (a - 1) points to an unallocated memory location, you get undefined behavior.



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https://math.answers.com/math-and-arithmetic/C_allows_an_array_index_of_both_positive_and_negative_integer

C allows an array index of both positive and negative integer? - Answers

Yes, see the C99 ISO standard §6.5.2.1/2. Assuming a pointer "a" into an allocated array, a[-1] is equivalent to *(a - 1). Naturally, if (a - 1) points to an unallocated memory location, you get undefined behavior.

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      Yes, see the C99 ISO standard §6.5.2.1/2. Assuming a pointer "a" into an allocated array, a[-1] is equivalent to *(a - 1). Naturally, if (a - 1) points to an unallocated memory location, you get undefined behavior.

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