原文是:
List2Node是自定义类
List1Node也是自定义类
List中有组合着List1Node和List2Node的指针
List2Node* List::lookupbook(List1Node *q1,string name)//传入要删除的种类当中的书,并找到该书的地址
错误提示:D:\work by C++\Test_list.cpp(93) : error C2556: 'struct List2 *__thiscall List::lookupbook(struct List1 *,class std::basic_string,class std::allocator >)' : overloaded function differs only by return type fro
m 'struct List1 *__thiscall List::lookupbook(struct List1 *,class std::basic_string,class std::allocator >)'
D:\work by C++\Test_list.cpp(72) : see declaration of 'lookupbook'
请教各位大神,这是什么原因?由于本人是初学者,不是很了解这错误是应为什么而出错.