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In general avoid frivolous use of pointer arithmetic. foo[k] and *(foo+k) will usually generate identical asm, and the former is just easier to read…

Usually? I‘m willing to bet it will always. I wouldn‘t be surprised if the standard even specifies these two to be identical.

a[b] is defined as syntactic sugar for *(a+b), so yes.

And if you want to go for eclectic, you can do [k]foo

You mean k[foo].

Yes indeed.