Tuesday, July 16, 2024
Monday, July 15, 2024
Simple Calculator Using Abstraction in C++
Program Listing
#include <iostream>
// Abstract class for calculator operations
class Operation {
public:
virtual double calculate(double a, double b) = 0;
};
// Concrete subclasses for each operation
class Addition : public Operation {
public:
double calculate(double a, double b) override {
return a + b;
}
};
class Subtraction : public Operation {
public:
double calculate(double a, double b) override {
return a - b;
}
};
class Multiplication : public Operation {
public:
double calculate(double a, double b) override {
return a * b;
}
};
class Division : public Operation {
public:
double calculate(double a, double b) override {
if (b == 0) {
std::cerr << "Error: Division by zero is not allowed." << std::endl;
return 0; // Return 0 as an error value
}
return a / b;
}
};
int main() {
double num1, num2;
char operation;
std::cout <<"\n\n\tSimple Calculator Using Abstraction in C++\n";
std::cout << "\n\tGive two numbers: ";
std::cin >> num1 >> num2;
std::cout << "\tEnter the operation (+, -, *, /): ";
std::cin >> operation;
Operation* op = nullptr;
switch (operation) {
case '+':
op = new Addition();
break;
case '-':
op = new Subtraction();
break;
case '*':
op = new Multiplication();
break;
case '/':
op = new Division();
break;
default:
std::cerr << "\tError: Invalid operation." << std::endl;
return 1;
}
double result = op->calculate(num1, num2);
std::cout << "\n\tThe Result: " << result << std::endl;
std::cout << "\n\n\tEnd of Program. Thank you for using this program." << std::endl;
delete op;
return 0;
}
Sunday, July 14, 2024
Empower Your Business with My IT Consulting Services!
Empower Your Business with My IT Consulting Services!
Are you navigating the complexities of modern technology? Gain a competitive edge with tailored IT solutions crafted to meet your unique business challenges. As a seasoned consultant specializing in Computer Organization, Operating Systems, and Database Systems, I provide strategic guidance and hands-on expertise to drive your business forward.
** My Services Offered:**
- **Strategic IT Planning:** Align technology with your business goals for sustainable growth and efficiency.
- **Infrastructure Assessment and Optimization:** Enhance performance and reliability through streamlined infrastructure solutions.
- **Security and Compliance:** Safeguard your assets with robust cybersecurity measures and regulatory compliance strategies.
- **Cloud Integration and Migration:** Harness the power of cloud technologies for scalability and cost-efficiency.
- **IT Project Management:** From inception to completion, ensure smooth project execution and delivery.
Partner with me to transform challenges into opportunities. Contact today to discuss how I can optimize your IT infrastructure and propel your business to new heights.
Feel free to personalize it further to highlight specific achievements, client successes, or industry expertise that set you apart! You may contact me here in the Philippines at
my mobile number 09173084360 and my email address at
jakerpomperada@gmail.com
Dr. Jake R. Pomperada,MAED-IT,MIT, PHD-TM
Freelance IT Consultant
Friday, July 12, 2024
Thursday, July 11, 2024
Difference of Two Numbers in C
#include <stdio.h>
int main()
{
int a=0,b=0,difference=0;
printf("\n\n");
printf("\tDifference of Two Numbers in C");
printf("\n\n");
printf("\tGive Two Numbers : ");
scanf("%d%d",&a,&b);
/* Compute the Difference of Two Numbers */
difference = (a - b);
printf("\n\n");
printf("\t===== DISPLAY RESULTS =====");
printf("\n\n");
printf("\tThe difference between %d and %d is %d.",a,b,difference);
printf("\n\n");
printf("\tEnd of Program");
printf("\n");
}
Wednesday, July 10, 2024
Student Record System in C++
Program Listing
#include <iostream>
#include <string>
class Student {
public:
// Constructor to initialize the student's information
Student(std::string name, int rollNumber, double marks) {
this->name = name;
this->rollNumber = rollNumber;
this->marks = marks;
}
// Function to display the student's information
void displayInfo() {
std::cout << "\n\tStudent Name: " << name << std::endl;
std::cout << "\tRoll Number: " << rollNumber << std::endl;
std::cout << "\tMarks: " << marks << std::endl;
}
private:
std::string name;
int rollNumber;
double marks;
};
int main() {
std::string name;
int rollNumber;
double marks;
// Input student information
std::cout <<"\n";
std::cout << "\tEnter student's name: ";
std::cin >> name;
std::cout << "\tEnter roll number: ";
std::cin >> rollNumber;
std::cout << "\tEnter marks: ";
std::cin >> marks;
// Create a Student object with the provided information
Student student(name, rollNumber, marks);
char choice;
do {
std::cout << "\n\tStudent Record Main Menu\n" << std::endl;
std::cout << "\t[1] Display student information" << std::endl;
std::cout << "\t[2] Quit Program" << std::endl;
std::cout << "\tEnter your choice: ";
std::cin >> choice;
if (choice == '1') {
// Display the student's information
student.displayInfo();
} else if (choice != '2') {
std::cout << "\n\tInvalid choice. Please try again." << std::endl;
}
} while (choice != '2');
std::cout << "\n\tEnd of Program. Thank you for using this program." << std::endl;
return 0;
}
Tuesday, July 9, 2024
How To Become a Database Administrator?
How To Become a Database Administrator?
Becoming a database administrator (DBA) typically involves a combination of education, experience, and specific skills. Here’s a general roadmap to becoming a DBA.
1. Education
Start with a relevant bachelor’s degree in Computer Science, Information Technology, or a related field. Some employers may prefer candidates with a master’s degree for senior positions.
2. Gain Technical Skills
Database Systems: Develop proficiency in popular database management systems (DBMS) such as MySQL, PostgreSQL, Oracle, SQL Server, MongoDB, etc.
3. SQL
Master SQL (Structured Query Language) for querying and managing data in databases.
4. Data Modeling
Understand data modeling techniques to design efficient database schemas.
5. Backup and Recovery
Learn about database backup, recovery, and disaster recovery procedures.
6. Performance Tuning
Gain skills in optimizing database performance through indexing, query optimization, etc.
6. Gain Experience
Start with entry-level roles like database developer or data analyst to gain hands-on experience with databases.
Progress to roles that involve more database administration responsibilities as you gain experience.
7. Certification
Consider obtaining certifications from database vendors (e.g., Oracle Certified Professional, Microsoft Certified Solutions Expert) to validate your skills and knowledge.
8. Soft Skills
Develop good communication skills, problem-solving abilities, and the ability to work under pressure, as DBAs often need to handle critical database issues.
9. Stay Updated
Keep up with industry trends and new technologies in database management.
10. Networking
Build a professional network through industry events, forums, and online communities to stay connected and learn from others in the field.
Monday, July 8, 2024
I was assigned as Program Chair in Computer Studies in University of Negros Occidental Recoletos Graduate School
I am very happy to announce my appointment as Program Chair in the Computer Studies in the University of Negros Occidental - Recoletos Graduate School stating this July 8, 2024. Thank you LORD for this opportunity and also to my dean Dr. Dennis Madrigal for the support and trust you have given me.
Saturday, July 6, 2024
Thursday, July 4, 2024
Wednesday, July 3, 2024
Tuesday, July 2, 2024
Monday, July 1, 2024
Sunday, June 30, 2024
Bank Account in C++
Program Listing
#include <iostream>
#include <iomanip>
class BankAccount {
private:
double balance;
public:
BankAccount() : balance(0.0) {}
void deposit(double amount) {
if (amount > 0) {
balance += amount;
std::cout << "\tDeposited PHP" <<std::fixed <<std::setprecision(2) << amount << ". New balance: PHP" << balance << std::endl;
} else {
std::cout << "\tInvalid deposit amount." << std::endl;
}
}
void withdraw(double amount) {
if (amount > 0 && amount <= balance) {
balance -= amount;
std::cout << "\tWithdrawn PHP" <<std::fixed <<std::setprecision(2)<< amount << ". New balance: PHP" << balance << std::endl;
} else {
std::cout << "\tInvalid withdrawal amount or insufficient funds." << std::endl;
}
}
double getBalance() const {
return balance;
}
};
int main() {
BankAccount account;
int choice=0;
double amount=0.00;
while (true) {
std::cout << "\n\tBank Account Main Menu" << std::endl;
std::cout << "\t[1] Deposit Money" << std::endl;
std::cout << "\t[2] Withdraw Money" << std::endl;
std::cout << "\t[3] Check Balance" << std::endl;
std::cout << "\t[4] Quit Program" << std::endl;
std::cout << "\n\tEnter your choice: ";
std::cin >> choice;
switch (choice) {
case 1:
std::cout << "\tEnter the deposit amount: PHP";
std::cin >> amount;
account.deposit(amount);
break;
case 2:
std::cout << "\tEnter the withdrawal amount: PHP";
std::cin >> amount;
account.withdraw(amount);
break;
case 3:
std::cout << "\tCurrent balance: PHP" <<std::fixed <<std::setprecision(2)<< account.getBalance() << std::endl;
break;
case 4:
std::cout << "\tExiting. Thank you for using this program." << std::endl;
return 0;
default:
std::cout << "\tInvalid choice. Please try again." << std::endl;
}
}
return 0;
}
Friday, June 28, 2024
Temperature Converter Using Encapsulation in C++
#include <iostream>
class TemperatureConverter {
private:
double celsius;
double fahrenheit;
public:
TemperatureConverter() : celsius(0.0), fahrenheit(32.0) {}
void setCelsius(double c) {
celsius = c;
fahrenheit = (celsius * 9.0/5.0) + 32.0;
}
void setFahrenheit(double f) {
fahrenheit = f;
celsius = (fahrenheit - 32.0) * 5.0/9.0;
}
double getCelsius() const {
return celsius;
}
double getFahrenheit() const {
return fahrenheit;
}
};
int main() {
TemperatureConverter converter;
std::cout << "\n\tTemperature Converter Using Encapsulation in C++\n\n";
// Convert from Celsius to Fahrenheit
converter.setCelsius(35.0);
std::cout << "\t35 degrees Celsius is equal to " << converter.getFahrenheit() << " degrees Fahrenheit.\n";
// Convert from Fahrenheit to Celsius
converter.setFahrenheit(112.3);
std::cout << "\n\tEnd of Program\n\n";
return 0;
}
Thursday, June 27, 2024
Area of the Circle Using OOP Approach
#include <iostream>
#include <iomanip>
class Circle {
public:
// Constructor to initialize the radius
Circle(double radius) {
this->radius = radius;
}
// Method to calculate the area of the circle
double calculateArea() {
return 3.14159265359 * radius * radius; // Assuming Pi to be approximately 3.14159265359
}
// Method to calculate the circumference of the circle
double calculateCircumference() {
return 2.0 * 3.14159265359 * radius; // Assuming Pi to be approximately 3.14159265359
}
private:
double radius;
};
int main() {
double radius;
// Input the radius of the circle
std::cout << "\n\tArea of the Circle Using OOP Approach\n";
std::cout << "\n\tEnter the radius of the circle: ";
std::cin >> radius;
// Create a Circle object with the provided radius
Circle circle(radius);
// Calculate and display the area and circumference
double area = circle.calculateArea();
double circumference = circle.calculateCircumference();
std::cout << "\n\tThe Area of the circle: " <<std::fixed <<std::setprecision(2) << area << std::endl;
std::cout << "\tThe Circumference of the circle: " <<std::fixed <<std::setprecision(2) << circumference << std::endl;
std::cout << "\n\n\tEnd of Program. Thank you for using this program." << std::endl;
return 0;
}
Wednesday, June 26, 2024
Tuesday, June 25, 2024
Monday, June 24, 2024
What is a Data Center?
What is a Data Center?
Data centers are physical facilities that enterprises use to house business-critical applications and information and which are evolving from centralized, on-premises facilities to edge deployments and public-cloud services.
What is Oracle Application Express?
What is Oracle Application Express?
Oracle APEX (also known as APEX) is an enterprise low-code application development platform from Oracle Corporation. APEX is used for developing and deploying cloud, mobile and desktop applications.
What is Oracle Database?
What is Oracle Database?
An Oracle Database (aka Oracle RDBMS) is a collection of data organized by type with relationships being maintained between the different types. The primary purpose of a database is to store and retrieve related information.
Sunday, June 23, 2024
Tips for Effective Job Hunting
Tips for Effective Job Hunting
1. **Know What You Want**: Clarify your career goals and what kind of job you are looking for. This will help you target your search more effectively.
2. **Update Your Resume**: Tailor your resume for each job application, highlighting relevant skills and experiences. Keep it concise, clear, and error-free.
3. **Network**: Leverage your professional network, including LinkedIn and industry contacts. Networking can often lead to job opportunities that are not advertised.
4. **Use Job Search Engines**: Utilize job search engines like Indeed, Glassdoor, LinkedIn Jobs, etc., to find job openings. Set up alerts to receive notifications for new postings.
5. **Research Companies**: Identify companies you're interested in working for and research them thoroughly. Visit their websites, read their reviews, and understand their culture and values.
6. **Customize Your Cover Letter**: Write a targeted cover letter for each application. It should explain why you are interested in the position and how your skills align with the company’s needs.
7. **Prepare for Interviews**: Practice common interview questions and be ready to discuss your qualifications and experiences. Research the company and prepare thoughtful questions to ask.
8. **Follow Up**: After submitting applications or interviews, follow up with a thank-you email. It shows your enthusiasm and professionalism.
9. **Develop Skills**: Consider improving your skills through courses, certifications, or workshops related to your field. This can make you a more attractive candidate.
10. **Stay Organized**: Keep track of the jobs you’ve applied for, deadlines, and follow-ups. This helps you stay on top of your job search.
11. **Stay Positive and Persistent**: Job hunting can be challenging, so maintain a positive attitude and keep going even if you face rejection. Persistence often pays off in the end.
12. **Consider Temporary or Freelance Work**: If finding a full-time position is taking longer than expected, consider temporary work or freelancing to gain experience and expand your network.
By combining these strategies and staying proactive, you can increase your chances of finding a job that aligns with your career goals. Good luck with your job search!
Vehicle Using Inheritance in Python
class Vehicle:
print("\tVehicle is moving.")
class Car(Vehicle):
def move(self):
print("\tCar is driving.")
if __name__ == "__main__":
vehicle = Vehicle()
car = Car()
print("\n\n\tVehicle Using Inheritance in Python\n")
vehicle.move() # Calls the base class method
car.move() # Calls the overridden method in the derived class
print("\n\tEnd of Program. Thank you for using this program.")
Saturday, June 22, 2024
Friday, June 21, 2024
Wednesday, June 19, 2024
What is Time?
What is Time?
What is time, exactly? Physicists define time as the progression of events from the past to the present into the future. Basically, if a system is unchanging, it is timeless. Time can be considered to be the fourth dimension of reality, used to describe events in three-dimensional space. It is not something we can see, touch, or taste, but we can measure its passage.
Tuesday, June 18, 2024
Monday, June 17, 2024
Sunday, June 16, 2024
Thursday, June 13, 2024
Wednesday, June 12, 2024
Tuesday, June 11, 2024
Monday, June 10, 2024
What is a Project Manager?
What is a Project Manager?
A project manager is a professional who organizes, plans, and executes projects while working within restraints like budgets and schedules.
Count Vowels in a String Using a Class in C#
// VowelCounter.cs
// Author : Dr. Jake Rodriguez Pomperada, MAED-IT, MIT, PHD-TM
// Date : June 9, 2024 Sunday 10:49 PM
// Tools : Microsoft Visual Studio 2022 Community Edition (64 Bit)
// Website : http://www.jakerpomperada.com
// YouTube Channel : https://www.youtube.com/jakepomperada
// Email : jakerpomperada@gmail.com
using System;
using System.Linq;
// Define the VowelCounter class in C#
public class VowelCounter
{
public string inputString;
public int vowelCount;
public VowelCounter()
{
inputString = "";
vowelCount = 0;
}
public void GetInputString()
{
Console.WriteLine("\n\tCount Vowels in a String Using a Class in C#\n");
Console.Write("\n\tEnter a string: ");
inputString = Console.ReadLine().Trim();
}
public void ConvertToLowerCase()
{
inputString = inputString.ToLower();
}
public void CountVowels()
{
foreach (char c in inputString)
{
if ("aeiou".Contains(c))
{
vowelCount++;
}
}
}
public void DisplayResult()
{
Console.WriteLine("\n\tString in lowercase : " + inputString);
Console.WriteLine("\n\n\tNumber of vowels : " + vowelCount);
Console.WriteLine("\n\n\tEnd of Program\n");
Console.ReadKey();
}
}
// Main program in C#
class Program
{
static void Main(string[] args)
{
VowelCounter counter = new VowelCounter();
counter.GetInputString();
counter.ConvertToLowerCase();
counter.CountVowels();
counter.DisplayResult();
}
}
Friday, June 7, 2024
Skills Needed To Become a Frontend Developer
Skills Needed To Become a Frontend Developer
Becoming a proficient frontend developer requires a blend of technical skills, a keen eye for design, and the ability to adapt to evolving technologies. Here are the essential skills you need to develop:
### 1. **Core Technologies**
- **HTML**: Understand the structure of web pages.
- **CSS**: Master styling web pages with techniques such as Flexbox and Grid layout.
- **JavaScript**: Gain a strong foundation in the language, including ES6+ features.
### 2. **Frameworks and Libraries**
- **React**: Widely used for building user interfaces.
- **Angular**: Another popular framework for single-page applications.
- **Vue.js**: Known for its simplicity and flexibility.
- **SASS/LESS**: Preprocessors that extend CSS capabilities.
### 3. **Version Control**
- **Git**: Proficiency in using Git for version control and collaboration.
### 4. **Responsive Design**
- **Media Queries**: Adapt designs for various screen sizes.
- **Mobile-First Design**: Prioritize mobile devices in the design process.
### 5. **Build Tools and Task Runners**
- **Webpack**: Module bundler for modern JavaScript applications.
- **Gulp/Grunt**: Automate tasks in the development workflow.
### 6. **Package Managers**
- **npm/yarn**: Manage project dependencies efficiently.
### 7. **API Consumption**
- **REST**: Understand how to interact with RESTful APIs.
- **GraphQL**: Knowledge of querying APIs with GraphQL.
### 8. **Testing and Debugging**
- **Unit Testing**: Frameworks like Jest, Mocha.
- **Debugging**: Use browser developer tools effectively.
### 9. **Development Tools**
- **IDEs**: Familiarity with Visual Studio Code, Sublime Text, etc.
- **Browser Developer Tools**: Proficient in using Chrome DevTools, Firefox Developer Tools.
### 10. **Performance Optimization**
- **Page Speed**: Techniques to improve loading times.
- **Code Splitting**: Efficiently load parts of the application.
### 11. **Basic Design Principles**
- **UX/UI Design**: Understand the basics of user experience and interface design.
- **Accessibility**: Ensure web applications are accessible to all users.
### 12. **Soft Skills**
- **Problem-Solving**: Analytical skills to tackle coding challenges.
- **Communication**: Ability to explain technical concepts to non-technical stakeholders.
- **Collaboration**: Work effectively within a team, often with designers and backend developers.
- **Adaptability**: Keep up with the latest trends and changes in the frontend development landscape.
### 13. **Optional but Beneficial**
- **TypeScript**: Adds static types to JavaScript, reducing runtime errors.
- **Progressive Web Apps (PWAs)**: Create apps that offer a native-like experience.
- **Server-Side Rendering (SSR)**: Techniques such as Next.js for rendering React apps on the server.
### Learning Resources
- **Online Courses**: Platforms like Udemy, Coursera, and freeCodeCamp.
- **Documentation**: Official documentation for frameworks and libraries.
- **Communities**: Join forums, attend meetups, and participate in hackathons.
By developing these skills and continuously learning, you'll be well-equipped to succeed as a frontend developer.