Problems with Class Constructors

[budzbox]

I cannot seem to figure out what I am doing wrong here. I have a lot more code I am trying to get working, but I get the same errors with this simple code, so I figure I will start there. I am copying this almost directly from the book I am using, so I am totally lost on this one.

Code

#include <iostream>
using namespace std;
class Server
{
public:
Server(char letterName);
};
int main()
{
Server sq('A'), s2('B');
return 0;
}

After this, it will not compile. I get the error:
[Linker Error]Undefined reference to 'Server::Server[char]
[Linker Error]Undefined reference to 'Server::Server[char]
Id returned 1 exit status

I am using DevC++ and it is my only compiler I have. Any help is appreciated.

Thanks

[firedraco]

You have to define what the constructor does. Currently, you are just saying "it exists" (prototyping it), and not defining it, causing the linker to complain.

[budzbox]

Ah, I knew it was something like that. The book has terrible explainations, and it is pretty hard to try and read through.

Does something like this look properly set-up? This one compiles fine, so unless I am missing something else, I think I can run with this format.

#include <iostream>
using namespace std;

class Server
{
public:
Server(char);
char g;
};

Server::Server(char a)
{
g = a;
}

int main()
{
Server sq('A'), s2('B');
return 0;
}


Thanks a lot for the help!!!

[firedraco]

Yes, that would work.