621类的识别方法 A partial requirements document: The user must be allowed to specify each product byl its primary characteristics, including its name an product number If the bar code does not match the product, then an error should be generated to the message window and entered into the error log. The summary report of all transactions must be structured as specified in section 7.A 并非每一个名词都对应这程 序中的一个类。6.2.1 类的识别方法 ◼ A partial requirements document: The user must be allowed to specify each product by its primary characteristics, including its name and product number. If the bar code does not match the product, then an error should be generated to the message window and entered into the error log. The summary report of all transactions must be structured as specified in section 7.A. 并非每一个名词都对应这程 序中的一个类