Help~~ c++ link problem!!!

hankpher

Sorry about that I can't input Chinese under Ubuntu environment..test

hehe

I'm a c++ rookie..

Followed by the problem:

I create 3 independant files named "sample.cpp","bank.h","bank.cpp".

sample.cpp -- the application source file,which include the header file bank.h;

bank.h -- the header file, but only contain the interface,that is,no implementation but only declaration of funtions.

bank.cpp -- the implementation of the header file.

Then I created a makefile like this:
//makefile//
sample:sample.o
        g++ -o sample sample.o
sample.o:sample.cpp bank.h
        g++ -c sample.cpp
//end//

the compilation is OK,while the link encountered a problem -- indicating the functions ,which are members of the class defined in the header file, are undeclared.BUT once I put the declaration part and the inplementaion part together in a SINGLE header file then everything is fine..YUMEN...

Help~~






bank.h
//begin..
#include<iostream>
using namespace std;

class bank
{
public:
        void print_money();
private:
        int money;
};


bank.cpp
//begin
#include<iostream>
#include"bank.h"
using namespace std;

void bank::print_money()
{
        cout<<money<<endl;
}

manphiz

Why didn't you compile the bank.cpp?
fix your Makefile:

sample : sample.o bank.o
g++ sample.o bank.o -o sample
sample.o : sample.cpp, bank.h
g++ -c sample.cpp
bank.o : bank.cpp, bank.h
g++ -c bank.cpp

rushrush

sample:sample.cpp bank.o

g++ -o sample sample.cpp bank.o

bank.o:bank.h bank.cpp

g++ -c bank.cpp

clean:

rm sample bank.o

Makefile应该是这样吧..
http://dev.csdn.net/develop/article/20/20025.shtm

manphiz

那些是tab。论坛默认无法显示tab的。

hankpher

ok ,i'll try..

hankpher

still can't make it..
help~~~

rickxbx

请帖出你的代码,makefile,以及出错信息..

hankpher

ok了，主要是另一个问题，必须定义专门的命名空间。。