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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

int main(int argc, char* argv[]) {
    int n = 5;
    int z = 7;

    int const* const a_n = &n;  // a_n and *a_n are read-only
    *a_n = 6;  // ... because *a_n is read-only
    a_n  = &z; // ... because  a_n is also read-only

    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */

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