How do I code a simple integer circular buffer in C/C++?

Question

I see a lot of templates and complicated data structures for implementing a circular buffer.

How do I code a simple integer circular buffer for 5 numbers?

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Answer 1

Have an array, buffer, of 5 integers. Have an index ind to the next element. When you add, do

buffer[ind] = value;
ind = (ind + 1) % 5;