I was hoping I could get some clarification on static variables of a class.
For example: I have two different classes which perform completely different functions, alpha and beta. Within alpha, I declare a static variable of type beta so it looks like this:
//alpha.h
#pragma once
#include <iostream>
#include "beta.h"
class alpha{
public:
alpha(){
}
static beta var;
void func(){
var.setX(3);
}
void output(){
}
};
//beta.h
#pragma once
#include <iostream>
using namespace std;
class beta{
public:
int x;
char y;
beta(){
x = 0;
y = ' ';
}
void setX(int _X){
x = _X;
}
};
//main.cpp
#include <iostream>
#include <iomanip>
#include "alpha.h"
using namespace std;
int main(){
alpha x, y, z;
x.func();
}
Now when I try to compile this, I get an unresolved externals error:
error LNK2001: unresolved external symbol "public: static class beta alpha::var" (?var@alpha@@2Vbeta@@A)
I'm not sure what to change or what else I need to add to make something like this work. I want x, y, and z to essentially share the same beta variable. I think I can accomplish this same thing by just passing by reference one beta variable into each of them. But I want to know if it's possible to do this same thing using the static keyword here because static members of a class have the same value in any instance of a class. Unless I have that definition wrong.
