inlineout.cpp

/*#include <iostream>
using namespace std;

class Box; // Forward declaration

class Display {
public:
    inline void showVolume(Box &b); // Marked inline
};

class Box {
    int length, width, height;

public:
    Box() {
        cout << "Enter length, width and height of the box: ";
        cin >> length >> width >> height;
    }

    // Declare Display as a friend class
    friend class Display;

    ~Box() {
        cout << "Box object destroyed." << endl;
    }
};

// Inline function defined outside the class
inline void Display::showVolume(Box &b) {
    int volume = b.length * b.width * b.height;
    cout << "Volume of the box is: " << volume << endl;
}

int main() {
    Box myBox;
    Display d;
    d.showVolume(myBox);
    return 0;
}

*/

#include<iostream>
using namespace std;

class box{
    int l;
    public:
    box(){

    }
    inline void display();
        //cout<<"hi"<<endl;
  //  }
};

inline void box::display(){
    cout<<"hi"<<endl;
}

int main(){
    box b;
    b.display();
    return 0;
}