关于C++的一些错误

Question

我想编译一个php代码到dll，我是这个创作的新东西，但我需要这个文件是dll。

这是我需要编译到DLL的代码：

#include "Stdafx.h" 
#include "Post.h" 
void DataSendAll(unsigned char* Packet, int Length) 
{ 
for (int i=6400; i<7400; i++) 
if(gObjIsConnected(i)) 
DataSend(i, Packet, Length); 
} 

void SendPost(int wId, LPCSTR Command, LPCSTR Text) 
{ 
if (IsPost != 1) return; 
if (!gObjIsConnected(wId)) return; 
if (!strcmpi(Command, "/Post")) 
{ 
MessageOutput(wId, "[%s] Useage: /Post <Msg>.", szPrefix); 
MessageOutput(wId, "[%s] Price for post: %d, Minimun Level: %d", szPrefix, PostCost, 
`PostLevel); 
return; 
} 
gObj_SetInfo(wId); 
if (gObj.Level < PostLevel) 
{ 
MessageOutput(wId, "[%s] You're level is too low to post!", szPrefix); 
return; 
} 
if (gObj.Money < PostCost) 
{ 
MessageOutput(wId, "[%s] You don't have enough money to post!", szPrefix); 
return; 
} 
BYTE *Packet; 
char Message[100]; 
Packet = (BYTE*) malloc(200); 
memset(Packet, 0x00, 200); 
*Packet = 0xC1; 
*(Packet+2) = 0x00; 
memcpy((Packet+3), gObj.Nick, strlen(gObj.Nick)); 
sprintf(Message, "@@[Global] %s", Text); 
memcpy((Packet+13), Message, strlen(Message)); 
int Len = (strlen(Message) + 0x13); 
*(Packet+1) = Len; 
DataSendAll(Packet, Len); 
int Amount = (gObj.Money - PostCost); 
gObj_Write(wId, gObj_Money, Amount); 
MoneySend(wId, Amount); 
free (Packet); 
} 

但它给我这个错误，当我尝试建立：

------ Build started: Project: Post, Configuration: Debug Win32 ------ 
Compiling... 
Post.cpp 
.\Post.cpp(6) : error C3861: 'gObjIsConnected': identifier not found 
.\Post.cpp(7) : error C3861: 'DataSend': identifier not found 
.\Post.cpp(10) : error C2061: syntax error : identifier 'LPCSTR' 
.\Post.cpp(12) : error C2065: 'IsPost' : undeclared identifier 
.\Post.cpp(13) : error C3861: 'gObjIsConnected': identifier not found 
.\Post.cpp(14) : error C2065: 'Command' : undeclared identifier 
.\Post.cpp(14) : error C3861: 'strcmpi': identifier not found 
.\Post.cpp(16) : error C2065: 'szPrefix' : undeclared identifier 
.\Post.cpp(16) : error C3861: 'MessageOutput': identifier not found 
.\Post.cpp(17) : error C2065: 'szPrefix' : undeclared identifier 
.\Post.cpp(17) : error C2065: 'PostCost' : undeclared identifier 
.\Post.cpp(17) : error C2065: 'PostLevel' : undeclared identifier 
.\Post.cpp(17) : error C3861: 'MessageOutput': identifier not found 
.\Post.cpp(20) : error C3861: 'gObj_SetInfo': identifier not found 
.\Post.cpp(21) : error C2065: 'gObj' : undeclared identifier 
.\Post.cpp(21) : error C2228: left of '.Level' must have class/struct/union 
type is ''unknown-type'' 
.\Post.cpp(21) : error C2065: 'PostLevel' : undeclared identifier 
.\Post.cpp(23) : error C2065: 'szPrefix' : undeclared identifier 
.\Post.cpp(23) : error C3861: 'MessageOutput': identifier not found 
.\Post.cpp(26) : error C2065: 'gObj' : undeclared identifier 
.\Post.cpp(26) : error C2228: left of '.Money' must have class/struct/union 
    type is ''unknown-type'' 
.\Post.cpp(26) : error C2065: 'PostCost' : undeclared identifier 
.\Post.cpp(28) : error C2065: 'szPrefix' : undeclared identifier 
.\Post.cpp(28) : error C3861: 'MessageOutput': identifier not found 
.\Post.cpp(31) : error C2065: 'BYTE' : undeclared identifier 
.\Post.cpp(31) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(33) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(33) : error C2065: 'BYTE' : undeclared identifier 
.\Post.cpp(33) : error C2059: syntax error : ')' 
.\Post.cpp(34) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(34) : error C3861: 'memset': identifier not found 
.\Post.cpp(35) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(36) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(37) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(37) : error C2065: 'gObj' : undeclared identifier 
.\Post.cpp(37) : error C2228: left of '.Nick' must have class/struct/union 
type is ''unknown-type'' 
.\Post.cpp(37) : error C2065: 'gObj' : undeclared identifier 
.\Post.cpp(37) : error C2228: left of '.Nick' must have class/struct/union 
type is ''unknown-type'' 
.\Post.cpp(37) : error C3861: 'memcpy': identifier not found 
.\Post.cpp(37) : error C3861: 'strlen': identifier not found 
.\Post.cpp(38) : error C2882: 'Text' : illegal use of namespace identifier in expression 

.\Post.cpp(38) : error C3861: 'sprintf': identifier not found 
.\Post.cpp(39) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(39) : error C3861: 'memcpy': identifier not found 
.\Post.cpp(39) : error C3861: 'strlen': identifier not found 
.\Post.cpp(40) : error C3861: 'strlen': identifier not found 
.\Post.cpp(41) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(42) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(43) : error C2065: 'gObj' : undeclared identifier 
.\Post.cpp(43) : error C2228: left of '.Money' must have class/struct/union 
type is ''unknown-type'' 
.\Post.cpp(43) : error C2065: 'PostCost' : undeclared identifier 
.\Post.cpp(44) : error C2065: 'gObj_Money' : undeclared identifier 
.\Post.cpp(44) : error C3861: 'gObj_Write': identifier not found 
.\Post.cpp(45) : error C3861: 'MoneySend': identifier not found 
.\Post.cpp(46) : error C2065: 'Packet' : undeclared identifier 
.\Post.cpp(46) : error C3861: 'free': identifier not found 
Build log was saved at "file://c:\Documents and Settings\Mihai\Desktop\Folder nou\Post\Post\Debug\BuildLog.htm" 
Post - 56 error(s), 0 warning(s) 
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== 

什么，我需要做什么？

我该怎么做才能使它工作。我使用：Visual C++ 2008 Express Edition。

Answer 1

\ Post.cpp（6）：错误C3861： 'gObjIsConnected'：标识符找不到

意味着编译器不知道你gObjIsConnected的意思。看起来你在那里调用一个函数或函数对象，但是因为你没有显示SSCCE，所以只能猜测它是在某个未包含的头中声明的。包括适当的标题，错误应该消失。

同样适用于DataSend和其他identifier not found消息。

\ Post.cpp（10）：错误C2061：语法错误：标识符 'LPCSTR'

这一个是只是轻微有点不同，因为它不是一个函数或变量。您在此处使用LPCSTR，但编译器不知道它是一种类型。其原因将与其他错误类似：您未能包含定义该类型的标头（我担心它是WinAPI标头之一）

其余的原因非常相似。包含缺少的标题，并且大部分错误都会消失。