定义一个类实现银行帐户的概念，包括的属性有"帐号"和"存款余额"，包括的方法有"存款"、"取款"、"查询余额"和”显示帐号”，。定义主类，创建帐户类的对象，并完成相应操作。-Define a class that implements the concept of bank accounts, including the properties of the " Account"　and " deposits" , including the method " deposit" , " withdrawal" , " check balance"　and " show account" . Define the main class, create an account object of the class and complete the operation.