Question

how do you grow a circular array in C++?

Answer 1

I beg your pardon, by circular you mean that if the index overflows it goes back to the beginning?

You could simply do a modulo by the array size. Try this:
myvar[access % (sizeof(myvar) / sizeof(int))

Answer 2

I have a mod. Thank you, and I agree, but my professor wants the circular array to grow.

Answer 3

I have a mod. Thank you, and I agree, but my professor wants the circular array to grow.