小编Dun*_*gLe的帖子

这是我的C++代码

// XuatChuoiBTHang.h
#pragma once
#include "BieuThuc.h"
#include "BieuThucHang.h"

class XuatChuoiBTHang
{
    public:
        virtual string xuatChuoi(BieuThucHang* btHang) = 0;     
};

// BieuThucHang.h
#pragma once
#include "bieuthuc.h"
#include "XuatChuoiBTHang.h"

class BieuThucHang : public BieuThuc
{
    private:
        XuatChuoiBTHang* xuatChuoiBTHang;
};

输出是:

"错误C2061:语法错误:标识符'BieuThucHang'"

怎么解决？

我在这里阅读了一个主题 http://www.mikeash.com/pyblog/friday-qa-2010-05-14-what-every-apple-programmer-should-know.html.迈克说"在调用你自己的类方法时总是使用[self class]".但我不明白为什么.你能给我举个例子吗 ？