摘要：
pure specifier can only be specified for functions英语不好，好像大概意思是 specifier（标示符，说明符）只能被specified（指定 精确确定） 在函数中 阅读全文
摘要：
6chapter1.cppLinking...6chapter1.obj : error LNK2001: unresolved external symbol "public: __thiscall BTree::~BTree(void)" (??1BTree@@QAE@XZ)6chapter1.obj : error LNK2001: unresolved external symbol "public: __thiscall BTree::BTree(void)" (??0BTree@@QAE@XZ)Debug/6chapter1.exe : fa 阅读全文