Simple Inheritance Private Base Class Example Program in C++

Example Program on Simple with Private Base Class

// Header Files
#include<iostream>

#include<stdio.h>
#include<conio.h>

using namespace std;

class Employee {
    int eno;
    char name[20], des[20];	
    // Private members cannot call from outside class.
public:
    void getEmpDetails() {
        cout << "\nEnter the Employee number:";
        cin>>eno;
        cout << "Enter the Employee name:";
        cin>>name;
        cout << "Enter the Employee designation:";
        cin>>des;
    }
    
    void employee_display() {
    	cout <<"\nEmployee number:"<<eno;
		cout <<"\nEmployee name:"<<name;
		cout <<"\nEmployee designation:"<<des;
    }
};

class Salary : private Employee {
	//Private Base Class, We cannot access outside the dervied Class
    float bp, hra, da, pf, np;
public:

    void getPayDetails() {
    	getEmpDetails();
        cout << "Enter the Basic pay:";
        cin>>bp;
        cout << "Enter the Humen Resource Allowance:";
        cin>>hra;
        cout << "Enter the Dearness Allowance :";
        cin>>da;
        cout << "Enter the Profitablity Fund:";
        cin>>pf;
    }

    void calculate() {
        np = bp + hra + da - pf;
    }

    void display() {
    	employee_display();
    	cout <<"\nEmployee Basic pay:"<<bp;
		cout <<"\nEmployee Humen Resource Allowance:"<<hra;
		cout <<"\nEmployee Dearness Allowance:"<<da;
		cout <<"\nEmployee Profitablity Fund:"<<pf;
		cout <<"\nEmployee Net Pay:"<<np<<endl;
    }
};

int main() {
    int i, n;
    char ch;
    Salary s[10];
    cout << "Simple Inheritance Private Base Class Example Program : Payroll System \n";
    cout << "Enter the number of employee:";
    cin>>n;
    for (i = 0; i < n; i++) {
    	cout << "\nEmployee Details # "<<(i+1)<<" : ";
        //getEmpDetails(); inaccessible from outside derived class, Which is private Base Class.
        s[i].getPayDetails();
        s[i].calculate();
    }

    for (i = 0; i < n; i++) {
        s[i].display();
    }
    getch();
    
    return 0;
}

Output

Simple Inheritance Private Base Class Example Program : Payroll System
Enter the number of employee:2

Employee Details # 1 :
Enter the Employee number:1
Enter the Employee name:BOSE
Enter the Employee designation:DOC
Enter the Basic pay:20000
Enter the Humen Resource Allowance:2000
Enter the Dearness Allowance :1000
Enter the Profitablity Fund:800

Employee Details # 2 :
Enter the Employee number:2
Enter the Employee name:AMZE
Enter the Employee designation:FIN
Enter the Basic pay:15000
Enter the Humen Resource Allowance:1200
Enter the Dearness Allowance :1200
Enter the Profitablity Fund:900

Employee number:1
Employee name:BOSE
Employee designation:DOC
Employee Basic pay:20000
Employee Humen Resource Allowance:2000
Employee Dearness Allowance:1000
Employee Profitablity Fund:800
Employee Net Pay:22200

Employee number:2
Employee name:AMZE
Employee designation:FIN
Employee Basic pay:15000
Employee Humen Resource Allowance:1200
Employee Dearness Allowance:1200
Employee Profitablity Fund:900
Employee Net Pay:16500

--------------------------------
Process exited after 57.27 seconds with return value 0
Press any key to continue . . .

How It Works

This C++ program demonstrates Simple Inheritance Private Base Class. It first reads the required values as input, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Iterate over the data using a loop to apply the logic.
4. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Continue learning with these related tutorials and programs:

• OOP Programs — Browse all OOP Programs.
• Understanding Inheritance in C++ — Tutorial — single, multilevel and hierarchical inheritance.
• Simple Inheritance Base Class Private Member Example Program — More in inheritance in c programs.
• Simple Multi Level Inheritance Example Program — More in inheritance in c programs.