OOP initialize data in function and show it using showdata function

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Object 

Create an employee class, basing it on Exercise 4 of Chapter 4. The member data should
comprise an int for storing the employee number and a float for storing the employee’s
compensation. Member functions should allow the user to enter this data and display it.

Source Code
#include <iostream>
using namespace std;
class employee
{
private:
    int noemployee;
    float income;
   
public:
    employee()
    {}

    void calculate(int number,float money)
    {
       
        noemployee=number;
        income=money;
    }

    void showdata()
    {
        cout<<"Employee number"<<noemployee<<endl;
        cout<<"employee income"<<income<<endl;
   
    }
};
void main()
{
    int no;
    float money;
    employee em1,em2,em3;
   
    cout<<"Enter Employee 1 : Number"<<endl;
    cin>>no;
      
    cout<<"Enter Employee 1 : income"<<endl;
    cin>>money;
    em1.calculate(no,money);
   

    cout<<"Enter Employee 2 : Number"<<endl;
    cin>>no;

    cout<<"Enter Employee 2 : Number"<<endl;
    cin>>money;
    em2.calculate(no,money);
   
   
    cout<<"Enter Employee 3 : Number"<<endl;
    cin>>no;

    cout<<"Enter Employee 3 : Number"<<endl;
    cin>>money;
    em3.calculate(no,money);

    em1.showdata();
    em2.showdata();
    em3.showdata();
}
 Output