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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 m = 11;
    int* const a_n = &n;   // a_n is read-only (protected).   *a_n is not protected.

    *a_n = 5;  // OK
    a_n = &m;  // ERROR:  assignment of read-only variable ‘a_n’
    
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */

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