$ g++ --version
g++ (Homebrew GCC 9.2.0) 9.2.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

#include <bits/stdc++.h>
using namespace std;

int main() {
    int aaa[10];

    fill(aaa, aaa + 10, 3);

    for (int i = 0; i < 10; i++) {
        printf("i: %d value: %d\n", i, aaa[i]);
    }
}

i: 0 value: 3
i: 1 value: 3
i: 2 value: 3
i: 3 value: 3
i: 4 value: 3
i: 5 value: 3
i: 6 value: 3
i: 7 value: 3
i: 8 value: 3
i: 9 value: 3
i: 10 value: 3