Free Programming Source Codes and Computer Programming Tutorials: February 2023

Tuesday, February 28, 2023

How To Become a Web Developer?

Area of a Circle in Ruby

A program that will ask the user to give radius of a circle and then the program will compute the area of a circle using Ruby programming language.

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My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
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=================================================

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https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

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Program Listing

print "\n"
print "\tArea of a Circle in Ruby\n\n"
print "\tGive the radius of the circle: "
radius = gets.chomp.to_f

area = Math::PI * radius ** 2

display = format('%.2f',area)

print "\n"
puts "\tThe area of the circle is #{display}."
print "\n"
print "\tEnd of Program"

Area of a Circle Using Pointers in C++

A program that will ask the radius of the circle from the user and then the program will compute the area of a circle using pointers in C++ programming language.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Please subscribe to my channel  https://www.youtube.com/channel/UCOs-lpOoIeJoh6gpJthPoGg
=================================================

You can buy my C++ book online at  

https://www.mindshaperspublishing.com/product/beginners-guide-to-c-programming/

You can buy my book in introduction to computer networking at 
https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

Want to support my channel?
GCash Account
Jake Pomperada

09173084360

Paypal
https://paypal.me/jakerpomperada

Patreon
https://www.patreon.com/jakerpomperada

Thank you very much for your support.



Program Listing

#include <iostream>
#include <iomanip>  // include iomanip library for setprecision()

using namespace std;

int main() {
    float radius=0.00, area=0.00;
    float *ptr;

    cout <<"\n";
    cout << "\tArea of a Circle Using Pointes in C++\n\n";
    cout << "\tGivethe radius of the circle: ";
    cin >> radius;

    ptr = &radius; // pointer points to the address of radius

    area = 3.14159 * (*ptr) * (*ptr); 
  // dereference pointer to get the value of radius and calculate area


    cout <<"\n\n";
    cout << fixed << setprecision(2); // set output to two decimal places
    cout << "\tThe area of the circle is: " << area << endl;
    cout <<"\n\n";
    cout <<"\tEnd of Program";
    cout <<"\n";
    return 0;
}

Sunday, February 26, 2023

Paano Maghanap ng Customer sa Computer Programming

Paano Ba Maging Computer Programmer?

Area of a Circle Using a Function in C#

A program that will ask the user to give the radius of the circle and then the program will compute the area of the circle using a function in C# programming language.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Please subscribe to my channel  https://www.youtube.com/channel/UCOs-lpOoIeJoh6gpJthPoGg
=================================================

You can buy my C++ book online at  

https://www.mindshaperspublishing.com/product/beginners-guide-to-c-programming/

You can buy my book in introduction to computer networking at 
https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

Want to support my channel?
GCash Account
Jake Pomperada

09173084360

Paypal
https://paypal.me/jakerpomperada

Patreon
https://www.patreon.com/jakerpomperada

Thank you very much for your support.




Program Listing

using System;

class Program {
    static double Area_Solve(double radius) {
        const double PI = 3.14159; // defining the value of pi
        return PI * radius * radius; // calculating the area of the circle
    }

    static void Main(string[] args) {
        double radius, area;
 
        Console.WriteLine();
        Console.WriteLine("\tArea of a Circle Using a Function in C#");
        Console.WriteLine();
        Console.Write("\tGive the radius of the circle: ");
        radius = Convert.ToDouble(Console.ReadLine());

        // calling the function to calculate the area of the circle
        area =  Area_Solve(radius);
        
        
        Console.WriteLine();
       Console.WriteLine("\tThe area of the circle with radius {0} is {1:0.00}."
       , radius, area);
        Console.WriteLine();
        Console.WriteLine("\tEnd of Program");
        Console.WriteLine();
        
    }
}

Saturday, February 25, 2023

Advice in Buying Your Personal Computer

Subtract Two Numbers in Java

Subtract Two Numbers Using Java

A simple program to subtract two given numbers using Java programming language.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Please subscribe to my channel  https://www.youtube.com/channel/UCOs-lpOoIeJoh6gpJthPoGg
=================================================

You can buy my C++ book online at  

https://www.mindshaperspublishing.com/product/beginners-guide-to-c-programming/

You can buy my book in introduction to computer networking at 
https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

Want to support my channel?
GCash Account
Jake Pomperada

09173084360

Paypal
https://paypal.me/jakerpomperada

Patreon
https://www.patreon.com/jakerpomperada

Thank you very much for your support.



Program Listing
/******************************************************************************

Welcome to GDB Online.
GDB online is an online compiler and debugger tool for C, C++, Python, Java, PHP, Ruby, Perl,
C#, OCaml, VB, Swift, Pascal, Fortran, Haskell, Objective-C, Assembly, HTML, CSS, JS, SQLite, Prolog.
Code, Compile, Run and Debug online from anywhere in world.

*******************************************************************************/
public class Main
{
	public static void main(String[] args) {
		int num1 = 200;
        int num2 = 50;
        int difference = num1 - num2;
        System.out.println("The difference between " + num1 + " and " + num2 + " is " 
        + difference + ".");

	}
}

Friday, February 24, 2023

Subtract Two Numbers Using Functions and Pointers in C++

A program that will ask the user to give two numbers and then the program will compute the difference of two given numbers using a function and pointers using C++ programming language.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Please subscribe to my channel  https://www.youtube.com/channel/UCOs-lpOoIeJoh6gpJthPoGg
=================================================

You can buy my C++ book online at  

https://www.mindshaperspublishing.com/product/beginners-guide-to-c-programming/

You can buy my book in introduction to computer networking at 
https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

Want to support my channel?
GCash Account
Jake Pomperada

09173084360

Paypal
https://paypal.me/jakerpomperada

Patreon
https://www.patreon.com/jakerpomperada

Thank you very much for your support.




Program Listing

#include <iostream>

using namespace std;

void subtract(int num1, int num2, int* result) {
    *result = num1 - num2;
}

int main() {
    int num1, num2;
    int result;

    cout <<"\n\n";
    cout << "\tSubtract Two Numbers Using Functions and Pointers in C++";
    cout <<"\n\n";
    cout << "\tEnter the first number: ";
    cin >> num1;

    cout <<"\n\n";
    cout << "\tEnter the second number: ";
    cin >> num2;

    subtract(num1, num2, &result);

    cout <<"\n\n";
    cout << "\tThe Result: " << result << endl;

     cout <<"\n\n";
    cout << "\tEnd of Program";
    cout <<"\n\n";
    return 0;
}

Thursday, February 23, 2023

Point of Sale in C

A simple point of sale program that I wrote using C programming language.

A program that will add the sum of two numbers using C# and WPF thank you to my friend and fellow software engineer Tom for this code for sharing to us.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Please subscribe to my channel  https://www.youtube.com/channel/UCOs-lpOoIeJoh6gpJthPoGg
=================================================

You can buy my C++ book online at  

https://www.mindshaperspublishing.com/product/beginners-guide-to-c-programming/

You can buy my book in introduction to computer networking at 
https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

Want to support my channel?
GCash Account
Jake Pomperada

09173084360

Paypal
https://paypal.me/jakerpomperada

Patreon
https://www.patreon.com/jakerpomperada

Thank you very much for your support.





Program Listing

#include <stdio.h>

int main() {
    char itemName[200];
    int quantity=0.00;
    float price, totalAmount = 0;
    
    printf("\n\n");
    printf("\tPoint of Sale in C\n\n");
    
    printf("\tEnter item name: ");
    gets(itemName);

    printf("\tEnter quantity: ");
    scanf("%d", &quantity);

    printf("\tEnter price: ");
    scanf("%f", &price);

    totalAmount = quantity * price;

    printf("\n\n**********PRINTED INVOICE**********************\n\n");
    printf("\tItem Name: %s\n", itemName);
    printf("\tTotal Quantity: %d\n", quantity);
    printf("\tPrice per item: $%5.2f\n\n", price);
    printf("\tTotal amount: PHP %5.2f\n\n", totalAmount);
    printf("************************************************\n");
    printf("\n\n");
    printf("\tEnd of Program\n");
    return 0;
}

Add Two Numbers Using C# and WPF

A program that will add the sum of two numbers using C# and WPF thank you to my friend and fellow software engineer Tom for this code for sharing to us.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Please subscribe to my channel  https://www.youtube.com/channel/UCOs-lpOoIeJoh6gpJthPoGg
=================================================

You can buy my C++ book online at  

https://www.mindshaperspublishing.com/product/beginners-guide-to-c-programming/

You can buy my book in introduction to computer networking at 
https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

Want to support my channel?
GCash Account
Jake Pomperada

09173084360

Paypal
https://paypal.me/jakerpomperada

Patreon
https://www.patreon.com/jakerpomperada

Thank you very much for your support.




Program Listing
using System.Windows;

namespace AddTwoNumbers
{
  /// <summary>
  /// Interaction logic for MainWindow.xaml
  /// </summary>
  public partial class MainWindow : Window
  {
    public MainWindow ()
    {
      InitializeComponent();
    }
// Add Button Code
    private void AddButton_Click (object sender, RoutedEventArgs e)
    {
      int num1 = int.Parse(txtFirstNum.Text);
      int num2 = int.Parse(txtSecondNum.Text);
      int result = num1 + num2;

      txtResult.Text = result.ToString();
    }

// Clear Button Code
    private void btnClear_Click (object sender, RoutedEventArgs e)
    {
      txtResult.Text = txtFirstNum.Text = txtSecondNum.Text = "";
    }
  }
}

Tuesday, February 21, 2023

Word Count in Pascal

A program that will ask the user to give a sentence or a series of strings. Our program will count the number of words that can be found on the given sentences or a series of strings using Pascal programming language.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
Please subscribe to my channel  https://www.youtube.com/channel/UCOs-lpOoIeJoh6gpJthPoGg
=================================================

You can buy my C++ book online at  

https://www.mindshaperspublishing.com/product/beginners-guide-to-c-programming/

You can buy my book in introduction to computer networking at 
https://www.unlimitedbooksph.com/product-page/introduction-to-computer-networking

Want to support my channel?
GCash Account
Jake Pomperada

09173084360

Paypal
https://paypal.me/jakerpomperada

Patreon
https://www.patreon.com/jakerpomperada

Thank you very much for your support.



Program Listing

program WordCount;

var
  sentence: string;
  count: integer;
  i: integer;
  inWord: boolean;

begin
  Writeln;
  Write('Word Count in Pascal');
  writeln;
  writeln('Enter a sentence:');
  readln(sentence);
  
  count := 0;
  inWord := false;
  
  for i := 1 to length(sentence) do
  begin
    if sentence[i] in ['a'..'z', 'A'..'Z', '0'..'9'] then
    begin
      if not inWord then
      begin
        inWord := true;
        count := count + 1;
      end;
    end
    else
    begin
      inWord := false;
    end;
  end;
  
  writeln('The sentence "', sentence, '" contains ', count, ' words.');
  
  readln; 
end.