I am trying to understand complicated declarations in C, and I wrote a sample function that takes as argument an array of integers of length 10 and returns a pointer to an array of length 10 of integers –

int (*x(int arr[10]))[10] {

    for (int i = 0; i < 10; i++) {
        arr[i] = 1;
    }

    return &arr[10];
}


int main() {

    int array[10];

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

    x(array);

    for (int i = 0; i < 10; i++) {
        printf("%d", array[i]);
    }
}

But I do not understand what to put as return. &arr[10] gives an error cannot convert 'int*' to 'int (*)[10]' in return. &arr also gives the same error. So what should be the appropriate return statement?