我试图端口这个Java单例类C++:C++链接错误未定义参考
public class Singleton {
private static Singleton uniqueInstance;
private Singleton() {}
public static Singleton getInstance() {
if (uniqueInstance == null) {
uniqueInstance = new Singleton();
}
return uniqueInstance;
}
}
我移植到这个C++代码:
class Singleton {
private:
Singleton() {
cout << "new Singleton is called" << endl;
}
static Singleton* uniqueInstance;
public:
static Singleton* getInstance() {
if (!uniqueInstance) {
uniqueInstance = new Singleton();
}
return uniqueInstance;
}
};
但我不能编译这个!和gcc链接器错误发生。
请准确显示链接器错误是什么。 – seand 2013-03-24 08:04:00