Linker error Undefined Symbol

[vsen123]

Hi,
I wanted to use multiple source files for one program.I created a file "key.h" as follows:

#ifndef KEY_H
#define KEY_H
class Inputk
{  int hkey[16][5];
	char Kuser[64];
	protected:
	int Key[65];
	public:
	Inputk();
	void read();
	void displayhex();
	~Inputk(){}
};
class Lookup1:public Inputk
{  int Key_temp[57],PC1[9][8];
	protected:
	int c[29],d[29];
	public:
	Lookup1();
	void displaycd();
	void Lk_up_pc1();
	~Lookup1(){}
};
class R_mov:public Lookup1
{  int It[17],tempc,tempd,cnt;
	protected:
	int cn[17][29];
	int dn[17][29];
	public:
	R_mov();
	void Rot_l();
	void Rot_display();
	~R_mov(){}
};
class Finale:public R_mov
{  int PC2[9][7],Key_t[57],t_cnt;
	protected:
	int Key_fin[][49];
	public:
	Finale();
	void Lk_up_pc2();
	void display();
	void key_run();
	~Finale(){}
};
#endif

The associated cpp file key.cpp was created as follows:

#include "key.h"
Inputk::Inputk()
{  
  //Contents of constructor
}
void Inputk::read()
{ 
  //Contents of function read
}
void Inputk::displayhex()
{
  //Contents of function displayhex
}
Lookup1::Lookup1()
{  
  //Contents of constructor 
}
void Lookup1::Lk_up_pc1()
{ 
  //Contents of function Lk_up_pc1
}
void Lookup1::displaycd()
{ 
   //Contents of function displaycd
}
R_mov::R_mov()
{ 
  //Contents of constructor
}
void R_mov::Rot_l()
{  
   //Contents of function Rot_l
}
void R_mov::Rot_display()
{  
  //Contents of function Rot_display
}
Finale::Finale()
{  
   //Contents of constructor
}
void Finale::Lk_up_pc2()
{ 
   //Contents of function Lk_up_pc2
}
void Finale::display()
{  
    //Contents of function display
}
void Finale::key_run()
{       clrscr();
	read();
	Lk_up_pc1();
	Rot_l();
	Lk_up_pc2();
	display();
}

The header file "key.h" was called in another program "datconv.cp p" as:

#include<iostream.h>
#include<fstream.h>
#include<conio.h>
#include<stdio.h>
#include "key.h"

class F_big:public Finale
{  
   //Contents of class
};
......
//Function definations of F_big
.......
void main()
{  F_big F;
   F.key_run();
   ....
}

The compiler didn't give any errors or warnings.Howeve r when I ran the program,I got 2 linker errors.
"Undefined symbol Finale::Finale( ) in module DATCONV.CPP"
"Undefined symbol Finale::key_run () in module DATCONV.CPP"
Any suggestions?

[MuraliCoder]

Hi, in declaration of class "Finale"

class Finale:public R_mov
{ int PC2[9][7],Key_t[57],t_cnt;
protected:
int Key_fin[][49];
public:
Finale();
void Lk_up_pc2();
void display();
void key_run();
~Finale(){}
};

i guess u had not given the array size for int Key_fin[][49];
give some value to this and try.. hope it will work...