Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
我正在做一个项目，我希望一旦我选择了两种产品，它应该读取它在收据中的销售费率，我使用 do while 循环而不是它来选择不同的产品费率，它只选择第二个产品费率和复制它