Constructing Nested class

[nabil]

Hi

I have probleam while while initilazing nested class ...

I needs to create a object 'b' of B(nested class) in A(surrounding class).

while constructing b I have to pass pointer of funtion in Class A.

But when I am doing this compilr throws error.

Please helpe me to solve this problem...

here is the code...

#include<iostream.h>
#include<stdlib.h>
class A {

int j;

public:

class B {

int i ;

public:

B(){
cout<< "B is created \n";
}

B(void (*pf)()) {
cout<< "B is created....funp \n";
}

B(int i) {

cout<< "B is created...i \n";
}

void printB() {

cout<<"hai..B";
}


};


static int i;

B b;
B c;

A():b(show),c(j){ // <=======error is here
}

A(void (*pf)()) {

}

void show () {
cout<<"hello";
}
};


void show () {
cout<<"hello";
}

int main() {

int i;

A o(show);
A c(show);
A a;
}


Nabil.

[gpraghuram]

HI,
You have to make following changes...
1)First the variable declaration B b should be changed to void (*b)();
2)Variable type of B c; should be changed.
3)Write a defaukt constructor for A.

I have made same changes and here is my code

#include<iostream>
#include<stdlib.h>
using namespace std;
class A {
int j;
public:
 
    class B 
    {
        int i ;
        public:
        B(){
        cout<< "B is created \n";
        }
        B(void (*pf)()) {
        cout<< "B is created....funp \n";
        }
        B(int i) {
        cout<< "B is created...i \n";
        }
        void printB() {
        cout<<"hai..B";
        }
    };
 
 
static int i;
void (*b)();
//B b;
//B c;
 
    A(void (*show)()):b(show)
    { // <=======error is here
    }
    A()
    {
    }
 
    void show () {
    cout<<"hello";
    }
};
void show () {
    cout<<"hello";
    }
 
int main() {
 
int i;
 
A o(show);
A c(show);
A a;
} 
 
 

Thanks
Raghuram