CPP-Programming/Anonymous-class.cpp at master · Pranit5895/CPP-Programming · GitHub

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// CPP program to illustrate
// concept of Anonymous Class
// by scope restriction
#include<iostream>
using namespace std;

// Anonymous Class : Class is not having any name
class
{
    // data member
    int i;
public:
    void setData(int i)
    {
        // this pointer is used to differentiate
        // between data member and formal argument.
        this->i = i;
    }
    void print()
    {
        cout << "Value for i : " << this->i << endl;
    }

} obj1;     // object for anonymous class

// Anonymous Class : Class is not having any name
class
{
    // data member
    int i;
public:
    void setData(int i)
    {
        // this pointer is used to differentiate
        // between data member and formal argument.
        this->i = i;
    }
    void print()
    {
        cout << "Value for i : " << this->i << endl;
    }

} obj2, obj3;    // multiple objects for anonymous class

// Anonymous Class : Class is not having any name
typedef class
{
    // data member
    int i;
public:
    void setData(int i)
    {
        // this pointer is used to differentiate
        // between data member and formal argument.
        this->i = i;
    }
    void print()
    {
        cout << "Value for i : " << this->i << endl;
    }

} myClass;      // using typedef give a proper name

// Driver function
int main()
{
    // multiple objects
    myClass obj4, obj5;

    obj1.setData(10);
    obj1.print();

    obj2.setData(20);
    obj2.print();

	obj3.setData(30);
    obj3.print();

	obj4.setData(40);
    obj4.print();

	obj5.setData(50);
    obj5.print();

    return 0;
}