incisive 发表于 2025-3-25 05:43:22
http://reply.papertrans.cn/63/6204/620317/620317_21.pngexercise 发表于 2025-3-25 07:50:44
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http://reply.papertrans.cn/63/6204/620317/620317_25.pngAVANT 发表于 2025-3-26 00:08:02
Inheritance, Method Overriding, and Events,In the previous chapter, you learned how to create classes and use them to create objects. By using encapsulation to define a class with its own properties and methods, objects can isolate the details of their code from the rest of a program.HEED 发表于 2025-3-26 04:30:18
http://reply.papertrans.cn/63/6204/620317/620317_27.pnghomeostasis 发表于 2025-3-26 10:03:41
Choosing Commands with Buttons,The user interface lets you communicate with a program. In the old days, you had to type a command to make a program do something. If you didn’t know the command to type or if you misspelled it, your command wouldn’t work, and the program wouldn’t respond to your actions.排斥 发表于 2025-3-26 15:45:03
Making Choices with Radio Buttons and Check Boxes,Buttons let the user choose a single command. However, many times, you may need to present the user with several options. You could display multiple buttons, where each button represents a single option, but this could look cluttered and messy. A more compact solution is to use radio buttons and check boxes.远足 发表于 2025-3-26 17:27:25
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