g ++：请求的头文件的编译 [英] g++: compilation of header file requested

问题描述

这是我从Deitel C ++书中复制的一个例子。但是当我编译它时，总是得到上面的编译错误，无论我如何更改包含顺序，请帮助。


这里是文件：

注意：这是练习代理类。


// Implementation.h


class实施{

public：

Implementation（int v）{this-> v = v; }

void setValue（int v）

{

this-> v = v;

}


int getValue（）const

{

返回v;

}


私人：

int v;

};


// Interface.h

类实现;


类接口{

public：

Interface（int）;

~Interface（）;

void setValue（int）;

int getValue（）const;


私人：

实施* ptr;

};


/ * Interface.cpp * /


#include" Implementation.h"

#include" Interface.h"


接口::接口（int v）：ptr（新的实现（v））

{}


接口:: ~Interface（）{delete ptr; }


void接口:: setValue（int v）{

ptr-> setValue（v）;

}


int接口:: getValue（）const {

返回ptr-> getValue（）;

}


/ * t.cpp * /


#include< iostream>


using namespace std;


#include" Interface.h"

#include" Implementation.h"


int main（ ）{

接口i（5）;


cout<< i.getValue（）<< endl;

i.setValue（19）;

cout<< i.getValue（）<< endl;

返回0;

}


＃============这是Makefile

＃Makefile

a.out：Implementation.h Interface.h Interface.cpp t.cpp

g ++ Implementation.h Interface.cpp t .cpp

干净：

rm -f a.out

cleanall：

rm -f * .h * .cpp a.out

Hi, here is an example I copied from Deitel C++ book. but when I
compile it, always get the above compilation error, no matter how I
change the include order, please help.

here is the files:
Note: this is to practice Proxy classes.

// Implementation.h

class Implementation {
public:
Implementation(int v) { this->v = v; }
void setValue(int v)
{
this->v = v;
}

int getValue() const
{
return v;
}

private:
int v;
};

// Interface.h

class Implementation;

class Interface {
public:
Interface(int);
~Interface();
void setValue(int);
int getValue() const;

private:
Implementation *ptr;
};

/* Interface.cpp */

#include "Implementation.h"
#include "Interface.h"

Interface::Interface(int v):ptr(new Implementation(v))
{ }

Interface::~Interface() { delete ptr; }

void Interface::setValue(int v){
ptr->setValue(v);
}

int Interface::getValue() const {
return ptr->getValue();
}

/* t.cpp */

#include <iostream>

using namespace std;

#include "Interface.h"
#include "Implementation.h"

int main(){
Interface i(5);

cout << i.getValue() << endl;
i.setValue(19);
cout << i.getValue() << endl;
return 0;
}

# ============ this is Makefile
# Makefile
a.out: Implementation.h Interface.h Interface.cpp t.cpp
g++ Implementation.h Interface.cpp t.cpp
clean:
rm -f a.out
cleanall:
rm -f *.h *.cpp a.out

推荐答案

blueblueblue2005写道：

blueblueblue2005 wrote:

这是我复制的一个例子来自Deitel C ++的书。但是当我编译它时，总是得到上面的编译错误，无论我如何更改包含顺序，请帮忙。


嗯，您可能想要阅读错误消息：它清楚地说

编译器抱怨它应该要求

编译头文件。

＃============这是Makefile
＃Makefile
a.out：Implementation.h接口。 h Interface.cpp t.cpp
g ++ Implementation.h Interface.cpp t.cpp

Hi, here is an example I copied from Deitel C++ book. but when I
compile it, always get the above compilation error, no matter how I
change the include order, please help.
Well, you might want to read the error message: it clearly says
that the compiler complains about the request that it should
compile a header file.
# ============ this is Makefile
# Makefile
a.out: Implementation.h Interface.h Interface.cpp t.cpp
g++ Implementation.h Interface.cpp t.cpp

上面的行应该是


g ++ Interface.cpp t.cpp

。

-

< mailto：di ** *********@yahoo.com> < http://www.dietmar-kuehl.de/>

< http://www.eai-systems.com> - 高效的人工智能

The above line should read

g++ Interface.cpp t.cpp

instead.
--
<mailto:di***********@yahoo.com> <http://www.dietmar-kuehl.de/>
<http://www.eai-systems.com> - Efficient Artificial Intelligence

您好，


您可能需要更改您的makefile。与此同时，我不理解为什么你在头文件中定义函数的主体

文件就像你在Implementation.h中所做的那样。据我所知，。h

文件仅用于声明函数原型和变量。我们不用
在头文件中写入函数体。这可能是导致这个编译错误的原因。
blueblueblue2005写道：

Hi,

May be you need to change your makefile. At the same time I dont
understand why r u defining the body of the functions within header
files like u did in Implementation.h. As far as my knowledge goes ".h"
files are for declaring function prototypes and variables only. We dont
write the body of the function within a header file. That might be the
reason why r u getting this compilation error.
blueblueblue2005 wrote:

这是我从Deitel C ++复制的一个例子书。但是当我编译它时，总是得到上面的编译错误，无论我如何更改包含顺序，请帮忙。

这里是文件：
注意：这是练习代理类。

// Implementation.h

类实现{
public：
Implementation（int v）{this - > v = v; }
void setValue（int v）
{
this-> v = v;
}
int getValue（）const
{
返回v;
}

私人：
int v;
};

// Interface.h <类实现;

类接口{
public：
Interface（int）;
~Interface（）;
void setValue（int）;
int getValue（）const;

私有：
实现* ptr;
};

/ *接口.cpp * /

#include" Implementation.h"
#include" Interface.h"

Interface :: Interface（int v）：ptr （新的实现（v））
{}

接口:: ~Interface（）{delete ptr; }

void Interface :: setValue（int v）{
ptr-> setValue（v）;
}
int接口:: getValue （）const {
return ptr-> getValue（）;
}
/ * t.cpp * /

#include< iostream> ;

使用命名空间std;

#include" Interface.h"
#include" Implementation.h"

int main（）{
接口i（5）;

cout<< i.getValue（）<< endl;
i.setValue（19）;
cout<< i.getValue（）<< endl;
返回0;
}

＃============这是Makefile
＃Makefile
a。 out：Implementation.h Interface.h Interface.cpp t.cpp
g ++ Implementation.h Interface.cpp t.cpp
clean：
rm -f a.out
cleanall：
rm -f * .h * .cpp a.out

Hi, here is an example I copied from Deitel C++ book. but when I
compile it, always get the above compilation error, no matter how I
change the include order, please help.

here is the files:
Note: this is to practice Proxy classes.

// Implementation.h

class Implementation {
public:
Implementation(int v) { this->v = v; }
void setValue(int v)
{
this->v = v;
}

int getValue() const
{
return v;
}

private:
int v;
};

// Interface.h

class Implementation;

class Interface {
public:
Interface(int);
~Interface();
void setValue(int);
int getValue() const;

private:
Implementation *ptr;
};

/* Interface.cpp */

#include "Implementation.h"
#include "Interface.h"

Interface::Interface(int v):ptr(new Implementation(v))
{ }

Interface::~Interface() { delete ptr; }

void Interface::setValue(int v){
ptr->setValue(v);
}

int Interface::getValue() const {
return ptr->getValue();
}

/* t.cpp */

#include <iostream>

using namespace std;

#include "Interface.h"
#include "Implementation.h"

int main(){
Interface i(5);

cout << i.getValue() << endl;
i.setValue(19);
cout << i.getValue() << endl;
return 0;
}

# ============ this is Makefile
# Makefile
a.out: Implementation.h Interface.h Interface.cpp t.cpp
g++ Implementation.h Interface.cpp t.cpp
clean:
rm -f a.out
cleanall:
rm -f *.h *.cpp a.out

blueblueblue2005写道：

blueblueblue2005 wrote:

这是我从Deitel C ++书中复制的一个例子。但是当我编译它时，总是得到上面的编译错误

Hi, here is an example I copied from Deitel C++ book. but when I
compile it, always get the above compilation error

[snip]

什么错误？消息正文中没有包含错误。确保

确保将您的问题包含在邮件的*正文*中，而不仅仅是主题行

。


/丹

[snip]
What error? There in no error included in the body of the message. Make
sure to include your problem in the *body* of the message not only in
the subject line.

/Dan

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