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Footnote 103 in subclause 6.5.3.4 of the C Standard [ISO/IEC 9899:2011] explainsapplies to all array parameters:

When applied to a parameter declared to have array or function type, the sizeof operator yields the size of the adjusted (pointer) type.

This applies to all array parameters.

Compliant Solution

In this compliant solution, the size of the array is determined inside the block in which it is declared and passed as an argument to the function:

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In this noncompliant code example, the sizeof a does not equal 100 * sizeof(int) because the sizeof operator, when applied to a parameter declared to have array or function type, yields the size of the adjusted (pointer) type , even if the parameter declaration specifies a length:

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Automated Detection

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