Trouble instantiating class with reference to another class - c++

Question

I'm trying to instantiate a few classes, with references to the first class passed along.
The compiler gives me an error stating: error: 'classData' is not a type.
ClassData hold some complicated data structures and has a bunch of accessors to that data. ClassFunc has a bunch of functions that operate on that data. Then the Work class does a bunch of work and occasionally needs to call a function in ClassB that will do some work on the data in ClassData.
Below is the code:
/////////////////////////
//ClassData.h
class ClassData {
public:
ClassData(){
// initialize a bunch of stuff
};
virtual ~ClassData(){};
}
/////////////////////////
//ClassFunc.h
#include "ClassData.h"
class ClassFunc {
public:
ClassFunc(ClassData& in_classData) : classData(in_classData){};
virtual ~ClassFunc();
float updateEta(float deltaVJ, int column);
private:
ClassData& classData;
};
/////////////////////////
//ClassFunc.cpp
#include "ClassFunc.h"
float ClassFunc::updateEta(float a, int b){
float foo = 0.0
// Do a bunch of work to foo
return foo;
};
/////////////////////////
// Work.h
#include "ClassData.h"
#include "ClassFunc.h"
class Work{
public:
Work(ClassData& in_class) : classData(in_class){
// initialize some stuff
};
~Work(){};
float updateTheta(int a, float b, float c);
private:
ClassData& classData;
ClassFunc classFunc(classData); //// ERROR IS HERE
}
/////////////////////////
// Work.cpp
#include "Work.h"
float Work::updateTheta(int a, float b, float c){
// do some work first
double foo = classFunc.updateEta(d, e);
return foo
};

Answer 1

Your compiler's right: classA isn't a type. C++ is case-sensitive; ClassA is the type you're looking for (check the first line of ClassB's constructor).
Hope that helps!

Answer 2

Answer After question modification
ClassFunc classFunc(classData); is not valid syntax in the definition of a class. You will need to have this classFunc variable by either a set function or through the constructor.
However, writing just a setter will be difficult because your ClassFunc requires a ClassData. In order to work around this, you may need to modify your ClassFunc also.
Also, there is another error. ClassData and Work are missing a ; at the end of its definition.
Original Answer before question modification
There are several errors in this code. Such as
float ClassA::funcA{
Should be
float ClassA::funcA(){
As other wise, it looks like a function definition.
Second, there is
ClassB(Class A& in_classA): classA(in_classA){
As it should be
ClassB(ClassA& in_classA): classA(in_classA){
As Class A is not a type.
Also, you are missing several semicolons but those should be obvious to spot.

Answer 3

The problem is that you cannot initialize member variables in the class declaration:
ClassFunc classFunc(classData);
Instead, initialize it in the initializer list of the constructor:
Work(ClassData& in_class) : classData(in_class), classFunc(classData) {}