simple compiling problem

hi everyone,

im having a problem linking my project..(the classes are very simple)

it compiles fine..but just wont link...im using ms visual C++..and my classes are

parser.cpp
table.cpp
pguide.cpp (has main)

as well as some .h files..

the error message is:
Linking...
pguide.obj : error LNK2001: unresolved external symbol "public: __thiscall parser::parser(void)" (??0parser@@QAE@XZ)
Debug/pguide.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

pguide.exe - 2 error(s), 0 warning(s)

can someone please help...thanks (the classes are below and .h files are in the attachements)
---------
pguide.cpp

Code:

---

#include "parser.h"
#include "table.h"

int main(void) {
       
        parser p;
        p.readFile();

        return 0;
}

---

----------------
table.cpp

Code:

---

#include "table.h"

table::table(void) {

        cellLength=0;
        noOfCells=0;
}

void table::printBar(void) {

}

---

-----------
parser.cpp

Code:

---

#include <fstream>
#include <string>
#include "parser.h"

using namespace std;

/* constructor */
parser::parser(void);

int parser::readFile(void) {

        string filename;
        string line;
 
        cout << "File name: ";
        cin >> filename;
 
        ifstream file(filename.c_str());
 
        if(!file.is_open()) {

                cout << "Error...file is not opened" << endl;
        return 0;
        }
       
        else
                return 1;
       

        while (!file.eof()) {

                getline(file, line);
                cout << line << endl;
        }

        file.close();
}

---

I think it has something to do with this:

Code:

---

int main(void) {
       
        parser p;

---

and

Code:

---

/* constructor */
parser::parser(void);

---

You haven't defined your constructor which was called by the line:

parser p;

Also, eliminate 'void' in the main header:

Code:

---

int main()
{

    //your code here

    return 0;
}

---

Quote:

---

Originally Posted by waxydock

hi everyone,

im having a problem linking my project..(the classes are very simple)

it compiles fine..but just wont link...im using ms visual C++..and my classes are

parser.cpp
table.cpp
pguide.cpp (has main)

as well as some .h files..

the error message is:
Linking...
pguide.obj : error LNK2001: unresolved external symbol "public: __thiscall parser::parser(void)" (??0parser@@QAE@XZ)
Debug/pguide.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

pguide.exe - 2 error(s), 0 warning(s)

can someone please help...thanks (the classes are below and .h files are in the attachements)
---------

---

you declared a constructor in parser.h:

Code:

---

public:

        parser(void);

---

But you never defined the function. In parser.cpp, change this

Code:

---

parser::parser(void);

---

to this:

Code:

---

parser::parser(void)
{
}

---

(Then, later when everything compiles OK, you can implement some functionality in the constructor.)

Regards,

Dave