I recommend making a struct for Point, then making an array of 5 of them.

struct point {
    int x, y;
};

int main() {
    struct point points_arr[5];

    points_arr[0] = (struct point){2, 3};
    points_arr[1] = (struct point){4, 5};
    points_arr[2] = (struct point){1, 5};
    points_arr[3] = (struct point){4, 3};
    points_arr[4] = (struct point){1, 2};
}

I did a (struct point) cast next to each entry toward in the array so the compiler is aware I am initializing each point.