13. How can affiliate marketing help my business?Affiliate marketing can help you grow your business in the following ways:
市场消息：苹果公司2025年将印度的iPhone产量提高了53%。据悉，苹果公司目前约有25%的iPhone在印度生产。（新浪财经）
，更多细节参见新收录的资料
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You can see that the changes are only in E1, E2, and E3. The latter one is required just for completeness. The interesting change is in E2 where I no longer use a block local static but the static data member from E1. You still have the two options: user-declared and user-defined constructor.