trying to Implement a class which takes another class as a parameter, caused to "no matching function for call to myclass(B)"

Question

the class A is A(int x, B y) and B is B(int z)
what is the problem?

Answer 1

Did you declare class B before class A?

Answer 2

Can you post some code on how you initialize them?

Answer 3

it's really hard to write code here but it's something like:

//A.h:
#include "B.h"

#ifndef A_H
#define A_H
Class A
{
public:
A (int , B );
...
private:
int x;
B y;
}

//A.cpp:
#include "A.h"
#include "B.h"
#include ...

A::A(int xx, B yy) /* Apparently the source of error */
{
setx (xx);
sety (yy);
}

//B.h:
class B
{
public :
B (int);
...
private :
int a;
}

//B.cpp:
#include "B.h"
B::B (int x)
{
setx (x);
}
...

//main:
#include "A.h"
#include "B.h"
#include...

int main ()
{
B beta (3);
A alpha (2,beta);
...
}