Free Programming Source Codes and Computer Programming Tutorials

Thursday, August 13, 2020

Memory Allocation in C

A program was written by my friend and fellow software engineer Thomas to demonstrate how to use memory allocation using C programming language. Thank you Tom for sharing your code to us.

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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. My telephone number at home here in Bacolod City, Negros Occidental Philippines is +63 (034) 4335675.

Here in Bacolod City, Negros Occidental I also accepting computer repair, web development using WordPress, Computer Networking, and Arduino Project development at a very affordable price. My personal website is http://www.jakerpomperada.com

Program Listing

#define DEBUG

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

void* alloc_mem(size_t size, const char *file, unsigned line)
{
     assert(size > 0);
     assert(file != NULL);

     void* res = malloc(size);
     if (res == NULL)
         fprintf(stderr, "malloc failed at %s(%u)\n",file, line);
     else {
         fprintf(stderr, "alloc\t%u\t%u\t%s\t%u\n", (unsigned int)res,
size,file, line);
         memset(res, 0xCC, size);
     }

     return res;
}

void free_mem(void *p, const char *file, unsigned line)
{
     assert(p != NULL);
     fprintf(stderr, "free\t%u\t?\t%s\t%u\n", (unsigned int)p, file, line);
}

#ifdef DEBUG
#define malloc(size)    alloc_mem(size, __FILE__, __LINE__)
#define free(p)         free_mem(p, __FILE__, __LINE__);
#endif

int f()
{
     int *num = malloc(sizeof(int *));

     return *num;
}

int main()
{
     int *ip = malloc(sizeof(int *));
     if (ip != NULL)
     {
         *ip = 11;
         printf("*ip = %d\n", *ip);
     }
     printf("Num = %d\n", f());
     free(ip);
     //system("pause");
     return EXIT_SUCCESS;

Wednesday, August 12, 2020

Product of Two Numbers in Java

A simple program that I wrote using Java programming language that will ask the user to give two numbers and then the program will compute the product of two numbers and display the results on the screen.

Sample Program Output

Program Listing

product.java

/* Product.java

* Author : Jake Rodriguez Pomperada, MAED-IT, MIT

* Email : jakerpomperada@gmail.com

* Place : Bacolod City, Negros Occidental Philippines

import java.util.Scanner;

public class Product {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

System.out.println();

System.out.println("\tProduct of Two Numbers in Java");

System.out.println();

System.out.print("\tGive First Number: ");

int num1 = in.nextInt();

System.out.print("\tGive Second Number: ");

int num2 = in.nextInt();

System.out.println();

System.out.println("\t"+ num1 + " x " + num2 + " = " + num1 * num2);

System.out.println();

System.out.println("\tEnd of Program");

System.out.println("\n\n");

}

Sunday, August 9, 2020

How To Run a PHP program in XAMPP?

Length of the String in C++

I wrote this simple program to find the length of the string using C++ programming language.

Sample Program Output

Program Listing

// length.cpp

// Author : Jake Rodriguez Pomperada,MAED-IT,MIT

// Email : jakerpomperada@gmail.com

#include <iostream>

#include <cstring>

using namespace std;

int main()

{

char str[] = "Information Technology";

cout << "\n\n";

cout << "\tLength of the String in C++";

cout << "\n\n";

cout << "\tThe Given String : " << str <<"\n\n";

cout << "\tThe String Length = " << strlen(str);

cout << "\n\n";

cout << "\tEnd of Program ";

cout << "\n\n";

}

Months and it's Days in PHP

I wrote this program to display the months and its corresponding days using PHP programming language.

Sample Program Output

Program Listing

<html>

<head>

<title>Months and it's Days in PHP </title>

</head>

<style>

body {

font-family: arial;

size : 12px;

};

</style>

<body>

<h2>Months and it's Days in PHP</h2>

<?php

$months=Array("January","February","March","April","May","June","July","August","September","October","November","December");

$count=1;

foreach($months as $current_month) {

print "$current_month has ".cal_days_in_month(CAL_GREGORIAN,$count,date("Y"))." days<Br>";

$count++;

}

</body>

</html>

Hello World in PHP

A very simple hello world program that I wrote using PHP programming language.

Program Listing

<html>

<head>

<title>Hello World in PHP </title>

</head>

<style>

body {

font-family: arial;

size : 12px;

color : red;

};

</style>

<body>

<?php

echo "<h1>Hello World in PHP </h1>";

</body>

</html>

Area of the Circle Using PHP

Friday, August 7, 2020

New Kids On The Block - Cover Girl (Official Video)

Tuesday, August 4, 2020

Linear Search in C Language

I wrote this program to ask the user to give a series of numbers and then number to be search using linear search algorithm in C programming language.

Sample Program Output

Program Listing

#include <stdio.h>

int main()
{
int array[100], search=0, c=0, n=0;

printf("\n");
printf("\tLinear Search in C Language");
printf("\n\n");
printf("\tEnter number of elements : ");
scanf("%d", &n);

printf("\tEnter %d integer(s)\n", n);

for (c = 0; c < n; c++)
    scanf("%d", &array[c]);

printf("\tEnter a number to search\n");
scanf("%d", &search);

for (c = 0; c < n; c++)
{
    if (array[c] == search)
    {
      printf("%d is present at location %d.\n", search, c+1);
      break;
    }
}
if (c == n) {
    printf("%d isn't present in the array.\n", search);
}
printf("\n");
printf("\tEnd of Program");
printf("\n");
}

Monday, August 3, 2020

Odd and Even Numbers Checkers in VB.NET

A simple program that I wrote to ask the user to give a number and then the program will check and determine whether the given number is an odd or even number using Microsoft Visual Basic.NET.

Sample Program Output

Program Listing

Public Class Form1

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

Dim MyValue As Integer

Dim isEven As Boolean

MyValue = Val(TextBox1.Text)

If MyValue Mod 2 = 0 Then

isEven = True

MsgBox("The number " & " " & MyValue & " is an EVEN number.")

Else

MsgBox("The number " & " " & MyValue & " " & "is an Odd number.")

End If

End Sub

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click

TextBox1.Text = ""

TextBox1.Focus()

End Sub

Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click

End

End Sub

End Class

Sunday, August 2, 2020

Subtraction of Two Numbers in Golang

I wrote this simple program using Go programming language to ask the user to give two numbers and then the program will compute the difference between of two numbers.

Sample Program Output

Program Listing

// substract.go
// Author : Jake Rodriguez Pomperada,MAED-IT,MIT
// Date    : August 2, 2020   10:20 AM
// Website : http://www.jakerpomperada.com
// Email   : jakerpomperada@gmail.com and jakerpomperada@yahoo.com

package main

import "fmt"

func main(){

    var n1 int
    var n2 int

    fmt.Print("\n\n")
    fmt.Print("\tSubtraction of Two Numbers in Golang")
    fmt.Print("\n\n")
    fmt.Print("\tEnter first number: ")
    fmt.Scanln(&n1) // take input from user
    fmt.Print("\tEnter Second number: ")
    fmt.Scanln(&n2) // take input from user

    solve := n1 - n2

    fmt.Print("\n")
    fmt.Println("\tThe difference between",n1,"and",n2, "is",solve,".")
    fmt.Print("\n")
    fmt.Print("\tEnd of Program")
    fmt.Print("\n")
}

Thursday, July 30, 2020

Today's Date in VB.NET

Today's Date in Visual Basic.NET

A very simple program that I wrote using Microsoft Visual Basic NET to display the current date.

Sample Program Output

Program Listing

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Dim dt As Date = Today

Label1.Text = "Today is " & dt

End Sub

End Class

Wednesday, July 29, 2020

Product of Two Numbers in Visual Basic 6

A simple program that I wrote to ask the user to give two numbers and then the program will compute the product of two numbers using Microsoft Visual Basic 6.

Sample Program Output

Program Listing

Private Sub Command1_Click()

Dim a, b, product As Integer

a = Val(Form1.Text1(0).Text)

b = Val(Form1.Text1(1).Text)

product = (a * b)

MsgBox ("The product of " & a & " and " & b & " is " & product & ".")

End Sub

Private Sub Command2_Click()

Form1.Text1(0).Text = ""

Form1.Text1(1).Text = ""

Form1.Text1(0).SetFocus

End Sub

Private Sub Command3_Click()

End

End Sub

Free Programming Source Codes and Computer Programming Tutorials

Thursday, August 13, 2020

Memory Allocation in C