C++ 中的抽象类其实就是纯虚函数组成的类，如下所示:
class SpreadsheetCell
{
public:
SpreadsheetCell();
virtual ~SpreadsheetCell();
virtual void set(const std::string& inString) = 0;
virtual std::string getString() const = 0;
};An abstract class provides a way to prevent other code from instantiating an object directly, as opposed to one of its subclasses.
抽象类只能被扩展，不能创建一个与他某个子类相冲突的对象实例！
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posted on 2007-02-12 16:40
TiGERTiAN 阅读(166)
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