unresolved external.

Hi,

I've been trying some OOP and despite cutting the code right down to skeleton, I'm still receiving the same error.

This is my header file:

Code:

---

class Shape
{
public:

        Shape (int l=0, int h=0);
private:

        int length;
        int height;

protected:

};

---

And this is main.cpp:

Code:

---

#include <iostream>
#include "vessel.h"

using namespace std;

int main()
{

        int x;
        int y;

        cout << "enter the heighe" << endl;
        cin >> x;
        cout << "enter he length" << endl;
        cin >> y;

        Shape square(x,y);


        system ("PAUSE");
        return 0;
}

---

I'm using Visual Studio 2005 and this is the full error being reported, find it a little hard to understand:

Code:

---

------ Build started: Project: my project, Configuration: Debug Win32 ------
Compiling...
main.cpp
Linking...
main.obj : error LNK2019: unresolved external symbol "public: __thiscall Shape::Shape(int,int)" (??0Shape@@QAE@HH@Z) referenced in function _main
C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\my project\Debug\my project.exe : fatal error LNK1120: 1 unresolved externals
Build log was saved at "file://c:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\my project\my project\Debug\BuildLog.htm"
my project - 2 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

---

Unfortunately after removing a lot of the code and being this with left, as I mention the same error is still occurring.

Really appreciate it if someone could tell me what I'm doing wrong.

Thanks very much :)

I'm guessing you did not add Shape.cpp to your project. If you did, does it implement the ctor that takes two ints?

Thanks medievalks :)

I just have two files: ( I know vessel.h is a daft name for a 'shape' class)

vessel.h
main.cpp

I'm unable to build the project, so cannot put a breakpoint to see if the constructor is working.

That's Every piece of code in the project.

Quote:

---

Originally Posted by Swerve

Hi,

I've been trying some OOP and despite cutting the code right down to skeleton, I'm still receiving the same error.

This is my header file:

Code:

---

class Shape
{
public:

        Shape (int l=0, int h=0);
private:

        int length;
        int height;

protected:

};

---

---

try

Code:

---

#ifndef VESSEL_H
#define VESSEL_H

class Shape
{
public:

        Shape (int l=0, int h=0);
private:

        int length;
        int height;

protected:

};

#endif

---

Thanks buddy but it still give the exact same error.

I have no idea, I've took a screen shot.

Does it compile if you change your Shape class to:

Code:

---

class Shape
{
public:

        Shape (int l=0, int h=0) : length(l), height(h) {}
private:

        int length;
        int height;

protected:

};

---

It certainly does bithub!!

I was proper flipping out then.

Couldn't get a screen capture for you guys, then it was the wrong size, then it was still the wrong size, then my browser stopped responding.

It works!

thank you thank you thank you

And that's pretty much what medievalelks suggested in the first reply.