Free Programming Source Codes and Computer Programming Tutorials

Monday, March 6, 2023

Centimeters To Meters and Kilometers in Java

A program that will ask the user length in centimeters and then our program will convert it into meters and kilometers using Java programming language.

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My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.
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Program Listing
import java.util.Scanner;

public class CentimeterConverter {
   public static void main(String[] args) {
       double centimeters, meters, kilometers;
       Scanner input = new Scanner(System.in);

       // Input centimeters
       System.out.println();
       System.out.print("\tCentimeters To Meters and Kilometers in Java\n\n");
       System.out.print("Enter length in centimeters: ");
       centimeters = input.nextDouble();

       // Convert to meters and kilometers with two decimal places
       meters = centimeters / 100.0;
       kilometers = centimeters / 100000.0;

       // Output results with two decimal places
       System.out.printf("%.2f centimeters is equal to %.2f meters.%n", centimeters, meters);
       System.out.printf("%.2f centimeters is equal to %.2f kilometers.%n", centimeters, kilometers);
   }
}

Sunday, March 5, 2023

Area of a Circle Using Functions in Pascal

Area of the Circle Using a Function in Pascal

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

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Program Listing
program AreaOfCircle;


function CalculateArea(radius: Double): Double;
const
  PI = 3.14159; // defining the value of pi
begin
  CalculateArea := PI * radius * radius; // calculating the area of the circle
end;

var
  radius, area: Double;

begin
  writeln;
  write('Area of a Circle Using Functions in Pascal');
  writeln;
  Write('Enter the radius of the circle: ');
  ReadLn(radius);

  // calling the function to calculate the area of the circle
  area := CalculateArea(radius);

  WriteLn('The area of the circle with radius ', radius:0:2, ' is ', area:0:2, '.');
  writeln;
  write('End of Program');
  writeln;
end.

Addition of Three Numbers Using OOP in C++

A simple program to demonstrate the concept of object oriented programming to add the sum of three numbers 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?
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Jake Pomperada

09173084360

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Thank you very much for your support.




Program Listing

#include <iostream>

using namespace std;

class Calculator {
    private:
        int num1;
        int num2;
        int num3;
    public:
        Calculator(int n1, int n2, int n3) {
            num1 = n1;
            num2 = n2;
            num3 = n3;
        }
        int add() {
            return num1 + num2 + num3;
        }
};

int main() {
    // Create an object of the Calculator class
    Calculator calc(10, 20, 30);

    // Call the add() method to add the three numbers
    int result = calc.add();

    // Print the result
    cout << "The sum of the three numbers is: " << result << endl;
    return 0;
}

Saturday, March 4, 2023

Sum and Product of Two Numbers in Ruby

A program that will ask the user to give two numbers and then the program will compute the sum and products of the two given numbers by user using the Ruby 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

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Thank you very much for your support.




Program Listing


print "Sum and Product of Two Numbers in Ruby\n\n"

# get input from user
print "Enter the first number: "
num1 = gets.chomp.to_i

print "Enter the second number: "
num2 = gets.chomp.to_i

# calculate sum and product
sum = num1 + num2
product = num1 * num2

# print results
puts "The sum of #{num1} and #{num2} is #{sum}."
puts "The product of #{num1} and #{num2} is #{product}."

Friday, March 3, 2023

Login Program in Pascal

Thursday, March 2, 2023

Login Program in Pascal

A simple login program that I wrote 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
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Thank you very much for your support.




Program Listing

program Login;

var
  username, password: string;

begin
  writeln;
  write('Login Program in Pascal');
  writeln;
  writeln;
  write('Give your username: ');
  readln(username);
  
  write('Give your password: ');
  readln(password);
  
   writeln;
   
  if (username = 'admin') and (password = 'admin') then
    writeln('Login successful!')
  else
    writeln('Incorrect username or password. Please try again.');
  
  readln; 
end.

Kilograms To Pounds in Pascal

Wednesday, March 1, 2023

Kilograms To Pounds in Pascal

A program that will ask the user to give weight in kilograms and then it will convert into pounds equivalent 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 KilogramsToPounds;

var
   kilograms, pounds: real;

begin
   writeln; 
   writeln('Kilograms To Pounds');
   writeln;
   write('Enter mass in kilograms:');
   readln(kilograms);

   pounds := kilograms * 2.20462;

   writeln;
   writeln(kilograms:0:2, ' kilograms is equal to ', pounds:0:2, ' 

pounds.');
   writeln;
   write('End of Program');
   writeln;
end.

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.

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

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;
}