类型可以是基元，如字符串(SDO称它们为“数据类型”，并定义了一个映射到php类型的集合)或复杂类型来代表序列或地址(SDO称它们为数据对象类型)。

Types can be primitives, such as string (SDO calls these "data types" and defines a set mapped to PHP types), or complex types to represent an order or address (SDO calls these data object types).

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然后，调用友元函数spacefriend并将类对象的地址作为其参数传递。然后调用template函数，先使用整数类型，然后使用浮点数据类型。

It then calls the friend function spacefriend and passes the class object address as its argument, and calls the template function, beginning with integer types and then floating data types.

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在应用程序中，以address类型的对象引用所有对象，而不必处理两种类型的地址。

In your application, refer to all objects as objects of type address, instead of having to deal with both types of addresses.

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