需要有关编译链接错误LNK2001的帮助 [英] need help on compilation link error LNK2001

问题描述

任何人都可以帮助我解决此链接错误.不知道为什么会这样:

Could anyone help me out to solve this linking error. Not sure why this happens:

Error   1   error LNK2001: unresolved external symbol "protected: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall cPlainKey::Print(void)" (?Print@cPlainKey@@MAE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ)  data.obj

涉及的代码:

the code which is involved in this:

#define cString std::string

class cPlainKeyDummy : public cPlainKey {
private:
  char *str;
protected:
  virtual cString Print(void);
}

cString cPlainKey::ToString(bool hide)
{
	char *tmp;
	sprintf(tmp, (hide ? "%c %.*X %s %.4s..." : "%c %.*X %s %s"),type,IdSize(),id,&PrintKeyNr(),&Print());
	return tmp;
}

cString cPlainKeyDummy::Print(void)
{
    return string(str);
}

添加错误数据:

Adding mising data:

class cPlainKey : public cSimpleItem {
friend class cPlainKeys;
friend class cMutableKey;
private:
  bool au, del, super;
protected:
  virtual cString Print(void);//=0;

public:
  int type, id, keynr;

  };
class cMutableKey : public cPlainKey {
private:
  cPlainKey *real;
protected:
  virtual cString Print(void);
  virtual cPlainKey *Alloc(void) const=0;
public:
  };

class cSimpleListBase;

class cSimpleItem {
friend class cSimpleListBase;
private:
  cSimpleItem *next;
public:
  virtual ~cSimpleItem() {}
  cSimpleItem *Next(void) const { return next; }
  };


cString cMutableKey::Print(void)
{
  return real->Print();
}

cString cPlainKey::PrintKeyNr(void)
{
	char ret[16];
	sprintf(ret, "%02X",keynr);
  return string(ret);
}

int cPlainKey::IdSize(void)
{
  return id>0xFF ? (id>0xFFFF ? 6 : 4) : 2;
}

文件很大，所以我试图找到所有的print()...

File is quite big, so I am trying to find all print()...
The code compiles fine it''s just not linking.

推荐答案

basic_string @ DU?

basic_string@DU?

char_traits @ D @ std @ @V?

char_traits@D@std@@V?

allocator @ D @ 2 @@ std @@ XZ)data.obj

allocator@D@2@@std@@XZ) data.obj

涉及的代码:

the code which is involved in this:

#define cString std::string

class cPlainKeyDummy : public cPlainKey {
private:
  char *str;
protected:
  virtual cString Print(void);
}

cString cPlainKey::ToString(bool hide)
{
	char *tmp;
	sprintf(tmp, (hide ? "%c %.*X %s %.4s..." : "%c %.*X %s %s"),type,IdSize(),id,&PrintKeyNr(),&Print());
	return tmp;
}

cString cPlainKeyDummy::Print(void)
{
    return string(str);
}

添加错误数据:

Adding mising data:

class cPlainKey : public cSimpleItem {
friend class cPlainKeys;
friend class cMutableKey;
private:
  bool au, del, super;
protected:
  virtual cString Print(void);//=0;

public:
  int type, id, keynr;

  };
class cMutableKey : public cPlainKey {
private:
  cPlainKey *real;
protected:
  virtual cString Print(void);
  virtual cPlainKey *Alloc(void) const=0;
public:
  };

class cSimpleListBase;

class cSimpleItem {
friend class cSimpleListBase;
private:
  cSimpleItem *next;
public:
  virtual ~cSimpleItem() {}
  cSimpleItem *Next(void) const { return next; }
  };


cString cMutableKey::Print(void)
{
  return real->Print();
}

cString cPlainKey::PrintKeyNr(void)
{
	char ret[16];
	sprintf(ret, "%02X",keynr);
  return string(ret);
}

int cPlainKey::IdSize(void)
{
  return id>0xFF ? (id>0xFFFF ? 6 : 4) : 2;
}

文件很大，所以我试图找到所有的print()...
代码可以很好地编译，只是不链接.

File is quite big, so I am trying to find all print()...
The code compiles fine it''s just not linking.

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