Write the prototype for a function that takes an array of exactly 16 integers

Question

One of the interview questions asked me to \"write the prototype for a C function that takes an array of exactly 16 integers\" and I was wondering what it could be? Maybe a

Answer 1

There are several ways to declare array-parameters of fixed size:

void foo(int values[16]);

accepts any pointer-to-int, but the array-size serves as documentation

void foo(int (*values)[16]);

accepts a pointer to an array with exactly 16 elements

void foo(int values[static 16]);

accepts a pointer to the first element of an array with at least 16 elements

struct bar { int values[16]; };
void foo(struct bar bar);

accepts a structure boxing an array with exactly 16 elements, passing them by value.