C++?中的抽象類其實(shí)就是純虛函數(shù)組成的類，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.
抽象類只能被擴(kuò)展，不能創(chuàng)建一個(gè)與他某個(gè)子類相沖突的對(duì)象實(shí)例！
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posted on 2007-02-12 16:40
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