So, if I find a PR164d that receives "nFee" then that would show they haven't been destroyed?
No, what I'm saying is that PRI64d is just a placeholder in the string for any integer.
So if I had printf("The Number Is %"PRI64d" In Case You Care\n", 4);
I'd get
"The Number Is 4 In Case You Care"
Indeed the line of code is just an output, used for testing purposes or something like that to see what the results of the output is. its impossible to exactly say what value PRI64d is based on by just showing us these 2 lines of code.