Web Artisans

Upload files using Ajax with Progress Bar

Uploading files using some server side languages are not a big deal. But, if we handle file uploads asynchronously, then we will be able to save time as well as some sudden overload to the server. Here is a very short working demo of code that uploads the file through Ajax. Actually, the file is uploaded via the server side code (here PHP), but the user don't have to step upto the next page and it feels like it is happening in client side.

1. Create an HTML file say, form.html and put the following code.

    <!DOCTYPE html>
    <html>
    <head>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.js"></script>
    <script src="http://malsup.github.com/jquery.form.js"></script>
    </head>
    <body>
    <div class="container">
    <h3 class="page-header">File Upload via Ajax with Progress Bar</h3>
    <div>
    <form action="upload.php" method="post" enctype="multipart/form-data">
    <input type="file" name="myfile"><br/>
    <input type="submit" value="Upload File to Server" class="btn btn-primary">
    </form>
    </div>
    <br/>
    <div class="progress">
    <div class="progress-bar progress-bar-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100">
    </div>
    <div class="percent">0%</div >
    </div>
    <p class="alert-info" id="status"></p>
    </div>

    <script>
    (function() {
    var bar = $('.progress-bar');
    var percent = $('.percent');
    var status = $('#status');

    $('form').ajaxForm({
    beforeSend: function() {
    status.empty();
    var percentVal = '0%';
    bar.width(percentVal);
    percent.html(percentVal);
    },
    uploadProgress: function(event, position, total, percentComplete) {
    var percentVal = percentComplete + '%';
    bar.width(percentVal);
    percent.html(percentVal);
    },
    success: function() {
    var percentVal = '100%';
    bar.width(percentVal);
    percent.html(percentVal);
    },
    complete: function(xhr) {
    status.html(xhr.responseText);
    status.addClass('alert');
    }
    });

    })();
    </script>
    </body>
    </html>

2. Now, handle the file upload into another file, upload.php as follows.

<?php
    $uploaddir = 'E:/WebArtisans/';  //Path to a directory on your file system
    $uploadfile = $uploaddir . basename($_FILES['myfile']['name']);

    if (move_uploaded_file($_FILES['myfile']['tmp_name'], $uploadfile)) {
        echo "File is successfully uploaded.";
    } else {
        echo "Upload failed.";
    }
?>

You can download the complete project from GitHub. Click here.

Now, run and see. :)

Windows 10 Release Date: July 29, 2015. How to Upgrade?

Microsoft has announced the release date of its most awaited Operating System, Windows 10. Microsoft has announced through its official blog that it will be released on July 29 this year.
People running Windows 7 and Windows 8/8.1 on their machines can upgrade to Windows 10 for free. In this version of Windows, it has the start button like in Windows 8.1, but is more user friendly and attractive.

Features of Windows 10
Windows 10 has many new and amazing features integrated. Some of them are:

It has Cortana Personal Digital Assistant, a digital personal assistant for your daily work.
It has Bio-metric System. You can unlock your device through your voice command, iris, finger-print and even from your face capture.
Spartan Browser: an entirely new internet browser is associated with Windows 10. It still has Internet Explorer for legacy system compatibility.
It has many other features such as Virtual desktop, Metro apps, Action Center Notifications, Revamped Mail and Calendar apps, Xbox apps etc.

How to Upgrade?

If you have Windows 7 or Windows 8/8.1 on your machine, then you can freely upgrade your machine to Windows 10. These are the steps you should follow:

At first make sure that your Windows is having regular updates. If you regularly update you Windows, you should have already be seen a Windows icon in your notification tray of taskbar.

2. A window appears, click on the "Reserve Your Free Upgrade".

3. Enter you email address in the next window, accept the privacy statement and click on "Send Confirmation" button.

4. All Done. You will get the Windows 10 on July 29 on your regular Windows Update. You won't miss a minute of its release. Almost 3GB files should be downloaded, that's only the time you require.

Upgrade to the latest Operating System of Windows and enjoy. Remember, this is the last Operation System of Windows series. So, don't miss it.

How to change the colors of folders?

Creating Folders Having Different Colors In Windows:

Windows doesn't allow us to create the colored folders by default. Hence we have to install a folder colorizer in our Windows to make it happen.

1. Download the folder colorizer setup file from here.

2. Install the downloaded setup file. If it asks to install the Microsoft .Net Framework, then install that too.

3. After the successful installation, you can now proceed to add colors to the folders of you PC.

4. Right click any folder to which you want to add color.

5. Select "Colorize!" option and then select the color you want to add.

6. Now refresh (F5) your computer to see the instant effect.

Enjoy! :)

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Web Artisans

Program to find the sum of the series 0.9, 0.99, 0.999, 0.9999, ..........

Problem:

WAP to display the series 0.9, 0.99, 0.999, 0.9999, .......... and also find the sum of the series.

Source Code:

/*to find the sum of the series 0.9, 0.99, 0.999, 0.9999, ..........*/
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main()
{
int i, n;
double j=0, sum=0;
printf("Enter the length of the series: ");
scanf("%d", &n);
printf("The series is\n");
for(i = 1; i <= n; i++)
{
j += 0.9/pow(10, i-1);
printf("%f, ", j);
sum += j;
}
printf("\nSum of the series is %f", sum);
system ("pause");
return 0;
}

Sample Run:

Enter the length of the series: 5

The series is

0.900000, 0.990000, 0.999000, 0.999900, 0.999990,

Sum of the series is 4.888890

Program to decide the type of a triangle.

Problem:

Given the lengths of three sides of a triangle. Write a program in C which decides the type (Right Angled, Acute, Obtuse, Isosceles, Scalene, Equilateral etc.) of the triangle.

Source Code:

/*to decide the type of triangle*/
#include <stdio.h>
#include <stdlib.h>
int main()
{
float a,b,c;
printf("Enter the length of three sides of a triangle: ");
scanf("%f%f%f",&a,&b,&c);
if(a > b + c || b > c + a || c > a+b)
{
printf("This is not a triangle.");
system ("pause");
exit(0);
}
else if( a == b && b == c && c == a)
printf("This is an equilateral triangle.");
else if(a==b || b==c || c==a)
printf("This is an isosceles triangle.");
else if(a*a == b*b + c*c || b*b == c*c + a*a || c*c == a*a + b*b)
printf("This is a right angled triangle.");
else if(a*a > b*b + c*c || b*b > c*c + a*a || c*c > a*a + b*b)
printf("This is an obtuse angled triangle.");
else if(a*a < b*b + c*c || b*b < c*c + a*a || c*c < a*a + b*b)
printf("This is an acute angled triangle.");
else
printf("This is a scalene triangle.");
system ("pause");
return 0;
}

Sample Output:

Enter the length of three sides of a triangle: 5 6 7

This is an acute angled triangle.

Program to display the number in reverse order.

Problem:

WAP to read four digit number and display the number in reverse order.

Source Code:

/*to display the numbers in reverse order*/
#include<stdio.h>
int main()
{
int n;
printf("Enter a four digit number: ");
scanf("%d", &n);
printf("The number in reverse order is ");
printf("%d", n %10);
n = n/10;
printf("%d", n %10);
n = n/10;
printf("%d", n %10);
n = n/10;
printf("%d", n %10);
return 0;
}

Sample Run:

Enter a four digit number: 1234

The number in reverse order is 4321

Program to find net salary

Problem:

WAP to read basic salary. Apart from basic salary, allowances are given as follows
a. TA (Travelling Allowance) is 5% of basic salary
b. DA (Daily Allowance) is 3% of basic salary
c. HRA (House Rate Allowance) is 8% of basic salary
Also, tax is witheld 1% of basic salary.
Finally, calculate the net salary

Source Code:

/*to find net salary*/
#include<stdio.h>
int main()
{
float bs, ta, hra, da, tax, ns;
printf("Enter the amount of basic salary: ");
scanf("%f", &bs);
ta = 0.05 * bs;
da = 0.03 * bs;
hra = 0.08 * bs;
tax = 0.01 * bs;
ns = bs + ta + da + hra - tax;
printf("Travelling Allowance = %f", ta);
printf("\nDaily Allowance = %f", da);
printf("\nHome Rate Allowance = %f", hra);
printf("\nTax = %f", tax);
printf("\nNet Salary = %f", ns);
return 0;
}

Sample Run:

Enter the amount of basic salary: 50000

Travelling Allowance = 2500.00

Daily Allowance = 1500.00

Home Rate Allowance = 4000.00

Tax = 500.00

Net Salary = 57500.00

To find total price paid by a customer

Problem:

WAP to read price of three items. Apart from normal cost, a customer has to pay 13% VAT and 10% service charge. Finally, calculate the total price paid by the customer.

Source Code:

/*to find total price*/
#include<stdio.h>
int main()
{
float nc1, nc2, nc3, nc, vat, sc, tp;
printf("Enter normal cost of first item: ");
scanf("%f", &nc1);
printf("Enter normal cost of second item: ");
scanf("%f", &nc2);
printf("Enter normal cost of third item: ");
scanf("%f", &nc3);
nc = nc1 + nc2 + nc3;
vat = 0.13 * nc;
sc = 0.10 * nc;
tp = nc + vat + sc;
printf("Total net cost = %f", nc);
printf("\nVat = %f", vat);
printf("\nService charge = %f", sc);
printf("\nTotal price = %f", tp);
return 0;
}

Sample Run:

Enter normal cost of first item: 3000

Enter normal cost of second item: 4500

Enter normal cost of third item: 6000

Total net cost = 13500.00

Vat = 1755.00

Service charge = 135.00

Total price = 15390.00

Program to read marks in five subjects and calculate the total and percentage

Source Code:

/*to find the total and percentage of an examination*/
#include<stdio.h>
int main()
{
int s1, s2, s3, s4, s5, tot;
float per;
printf("Enter the marks of 5 subjects: ");
scanf("%d %d %d %d %d", &s1, &s2, &s3, &s4, &s5);
tot = s1 + s2 + s3 + s4 + s5;
per = tot / 500.0 * 100;
printf("Total = %d", tot);
printf("\nPercentage = %f", per);
return 0;
}

Sample Run:

Enter the marks of 5 subjects: 90 89 88 87 86

Total = 440

Percentage = 88.00

Program to read principle, time and rate and calculate simple interest

Source Code:

/*to find the simple interest*/
#include<stdio.h>
int main()
{
float p, t, r, si;
printf("Enter the value of principle: ");
scanf("%f", &p);
printf("Enter the time (in years): ");
scanf("%f", &t);
printf("Enter the interest rate: ");
scanf("%f", &r);
si = (p * t * r) / 100;
printf("Simple Interest = %f", si);
return 0;
}

Sample Run:

Enter the value of principle: 10000
Enter the time (in years): 3
Enter the interest rate: 12
Simple Interest = 3600.00

Program to read the length and bredth of a rectangle and find the perimeter

Source Code:

/*to find the perimeter of a rectangle*/
#include<stdio.h>
int main()
{
    float l, b, p;
    printf("Enter the value of length: ");
    scanf("%f", &l);
    printf("Enter the value of breadth: ");
    scanf("%f", &b);
    p = 2 * (l + b);
    printf("Perimeter of the rectangle is %f", p);
    return 0;
}

Sample Run:

Enter the value of length: 5
Enter the value of breadth: 6

Perimeter of the rectangle is 22

C program to read the radius of a circle and calculate the area and circumference

Source Code:

/*to find the area and circumference of a circle*/

#include<stdio.h>

#include<math.h>

int main()

{

float r, a, c;

printf("Enter the value of radius: ");

scanf("%f", &r);

a = M_PI * r * r;

c = 2 * M_PI * r;

printf("Area of circle = %f", a);

printf("\nCircumference of the circle = %f", c);

return 0;

}

Sample run:

Enter the value of radius: 5

Area of circle = 78.539818

Circumference of the circle = 31.415926

Defining Member Function in C++

The data member of a class is declared within the body of the class. However, the member functions can be defined in one of the two places.

Inside the class definition
Outside the class definition

No matter whether the function is defines inside or outside the class definition, the function performs the same operation. But the syntax of the member function definition is different if declared inside or outside. The program code written inside the body of member function is the same whether it is declared inside or outside.

Inside the class definition:

The general syntax of the function definition inside class definition will be as:

class classname

{

//……………..

public:

return_type member_function(args…)

{

//function body

}

};

Following example illustrates the definition of function inside class definition:

Source Code:

//definition inside the class

#include<iostream>

using namespace std;

class student

{

private:

int roll;

char name[20];

char phone[10];

public:

void getdata()

{

cout<<"\nEnter Roll Number: ";

cin>>roll;

cout<<"Enter Name: ";

cin>>name;

cout<<"Enter Phone Number: ";

cin>>phone;

}

void showdata()

{

cout<<"Name: "<<name<<endl;

cout<<"Roll Number: "<<roll<<endl;

cout<<"Phone Number: "<<phone<<endl;

}

}; //end of class

int main()

{

student s1, s2;

s1.getdata();

s2.getdata();

cout<<"First Student"<<endl;

s1.showdata();

cout<<"Second Student"<<endl;

s2.showdata();

return 0;

}

Sample Run:

Enter Roll Number: 1

Enter Name: John

Enter Phone Number: 1234567890

Enter Roll Number: 2

Enter Name: Marrie

Enter Phone Number: 9876543210

First Student

Name: John

Roll Number: 1

Phone Number: 1234567890

Second Student

Name: Marrie

Roll Number: 2

Phone Number: 9876543210

2. Outside the class definition:

The general syntax of the function definition outside class definition will be as:

class classname

{

//……………..

public:

return_type member_function(args…);

//…………….

};

Return_type class_name::member_function(args…)

{

//function body

}

The declaration can be done in private or public section.

We have presented the same example presented above where member functions are defined outside the class specification.

Source Code:

//definition outside the class

#include<iostream>

using namespace std;

class student

{

private:

int roll;

char name[20];

char phone[10];

public:

void getdata(); //function declaration

void showdata();

}; //end of class

void student::getdata() //function definition

{

cout<<"\nEnter Roll Number: ";

cin>>roll;

cout<<"Enter Name: ";

cin>>name;

cout<<"Enter Phone Number: ";

cin>>phone;

}

void student::showdata()

{

cout<<"Name: "<<name<<endl;

cout<<"Roll Number: "<<roll<<endl;

cout<<"Phone Number: "<<phone<<endl;

}

int main()

{

student s1, s2;

s1.getdata();

s2.getdata();

cout<<"First Student"<<endl;

s1.showdata();

cout<<"Second Student"<<endl;

s2.showdata();

return 0;

}

Sample Run:

Enter Roll Number: 1

Enter Name: John

Enter Phone Number: 1234567890

Enter Roll Number: 2

Enter Name: Marrie

Enter Phone Number: 9876543210

First Student

Name: John

Roll Number: 1

Phone Number: 1234567890

Second Student

Name: Marrie

Roll Number: 2

Phone Number: 9876543210

Function Overloading in C++

In a program there can be many functions with different name. However, some functions conceptually perform the same task on objects of different types and numbers. In such a case it is convenient to give them same name. When the same name is used for different operation, it is called function overloading. When an overloaded function is called the function with matched arguments is invoked.
Examples of overloaded functions are as follows:
void display(); //function with no arguments
void display(int); //function with one int argument
void display(float); //function with one float argument
void display(int, float) //function with one int and
//one float argument

A Complete Example to demonstrate the function overloading is as follows:

Source Code:
//function overloading
#include<iostream>
using namespace std;
int max(int, int);
long max(long, long);
float max(float, float);
char max(char, char);

int main()
{
int i1 = 12, i2 = 22;
cout<<"Greater is "<<max(i1, i2)<<endl;
long l1 = 400000, l2 = 380000;
cout<<"Greater is "<<max(l1, l2)<<endl;
float f1 = 34.04, f2 = 54.455;
cout<<"Greater is "<<max(f1, f2)<<endl;
char c1 = 'f', c2 = 'F';
cout<<"Greater is "<<max(c1, c2)<<endl;
return 0;
}

int max(int i1, int i2)
{
return(i1 > i2 ? i1 : i2);
}

long max(long l1, long l2)
{
return(l1 > l2 ? l1 : l2);
}

float max(float f1, float f2)
{
return(f1 > f2 ? f1 : f2);
}

char max(char c1, char c2)
{
return(c1 > c2 ? c1 : c2);
}

Sample Run
Greater is 22
Greater is 400000
Greater is 54.455
Greater is f

How to make own captcha in Joomla?

The captcha can be used in many places to validate whether the user is real or not. It helps in maintaining the security of the site.
The following function will make an image that contains a random captcha in Joomla.

<?php
public function makeCaptcha()
{
$string = JUserHelper::genRandomPassword ('6');
$session = JFactory::getSession();
$session->set('value', $string);
$width = 100;
$height = 25;
$image = imagecreatetruecolor ($width , $height);
$text_color = imagecolorallocate($image, 130, 130, 130);
$bg_color = imagecolorallocate($image, 190, 190, 190);
imagefilledrectangle($image, 0, 0, $width, $height, $bg_color);
imagestring($image, 5, 16, 4, $string, $text_color);
ob_start();
imagejpeg ($image);
$jpg = ob_get_clean ();
return "data:image/jpeg;base64," . base64_encode($jpg);
}
?>

How to Compile a C Program on Ubuntu

This article will guide you to compile a C program on Ubuntu using the GNU gcc/g++ compiler. Additions were made in order to simplify and clarify the creation of a C program on Ubuntu.

1. Open up a terminal on Ubuntu and install the build-essential package by typing the following command in the terminal

sudo apt-get install build-essential
This will install the necessary C development libraries for your Ubuntu system to create C programs.

2. Create a directory and a sub directory to hold your C programs and your main HelloWorld program.

mkdir -p CProgram/HelloWorld
We are using CProgram for the main directory to hold our created C programs and we are using the sub directory HelloWorld to hold our main program.

3. Then we will change into our created directory by issuing the following command

cd CProgram/HelloWorld

4. Next we will use a text editor such as gedit or nano to create our C or C++ source code using the following command.

gedit main.c

nano main.c

5. Enter the source code of your program. For example: the HelloWorld program is as follows:

#include<stdio.h>
#include<stdlib.h>
int main()
{
printf("Hello World,\nThis is my first program compiled on Ubuntu.");

return 0;
}

6. Save the file as main.c and exit.

7. Compiling your C program

Make sure you are in the CProgram/HelloWorld directory before you compile your C programs.

Now type in the terminal:

gcc -Wall -W -Werror main.c -o HelloWorldC
The first line will invoke the GNU C compiler to compile the file main.c and output (-o) it to an executable called HelloWorldC.
The options -Wall -W and -Werror instruct the compiler to check for warnings.

9. If you get the permission errors, you need to make the file executable. You can do this by issuing the following commands below

chmod +x HelloWorldC

10. In order to execute your program you will have to type in the following commands.

./HelloWorldC

[Note: All the sentences that are highlighted are the commands that have to be written in Ubuntu terminal.]

Hack Facebook Using BiNu App on Mobile.

Follow following Steps to hack a Facebook account:

At first, download biNu app on mobile phone. Click HERE to download. (Currently biNu is not supported on the iPhone & Windows Phone)
After finishing the download just install it (automatically installs in android).
After that, Create a biNu's Account.
Now visit biNu's homepage and you will see Facebook icon.
Just click it you see Login screen of Facebook. It opens in the default browser of your phone.
Don't Login into Facebook.
Just copy the link from the address bar of your browser. (For example, the link should be like this: http://m.facebook.com/login.php?app_id=378628085054&skip_api_login=1&cancel=http%3A%2F%2Fm.binu.com%2Ffclient%2Fauth.php%3Ferror_reason%3Duser_denied%26error%3Daccess_denied%26error_description%3DThe%2Buser%2Bdenied%2Byour%2Brequest.%26state%3D335074%257C46567955%257C36.252.21.228&fbconnect=1&next=https%3A%2F%2Fm.facebook.com%2Fdialog%2Fpermissions.request%3F_path%3Dpermissions.request%26app_id%3D378628085054%26client_id%3D378628085054%26redirect_uri%3Dhttp%253A%252F%252Fm.binu.com%252Ffclient%252Fauth.php%26display%3Dtouch%26response_type%3Dcode%26state%3D335074%257C46567955%257C36.252.21.228%26perms%3Duser_about_me%252Cfriends_about_me%252Cuser_status%252Cfriends_status%252Cread_friendlists%252Cread_stream%252Cread_mailbox%252Coffline_access%252Cpublish_stream%252Cxmpp_login%26fbconnect%3D1%26from_login%3D1&rcount=1&_rdr)
After this visit https://bitly.com/ or https://goo.gl/ on your computer browser or mobile browser and get short link. (For example, the link should be like this: http://goo.gl/9HJCHa)
Now send this short link to your friend (the victim) one at a time.
After sending link to victim, refresh the Facebook at biNu's homepage. At this point the victim should have clicked on that link.
Now enjoy. You can read messages, post on wall, see friends list, update status and many more.

How to Upgrade?

Creating Folders Having Different Colors In Windows:

Windows doesn't allow us to create the colored folders by default. Hence we have to install a folder colorizer in our Windows to make it happen.

Problem:

Source Code:

Sample Run:

Problem:

Given the lengths of three sides of a triangle. Write a program in C which decides the type (Right Angled, Acute, Obtuse, Isosceles, Scalene, Equilateral etc.) of the triangle.

Source Code:

Sample Output:

Problem:

WAP to read four digit number and display the number in reverse order.

Source Code:

Sample Run:

Problem:

Source Code:

Sample Run:

Problem:

WAP to read price of three items. Apart from normal cost, a customer has to pay 13% VAT and 10% service charge. Finally, calculate the total price paid by the customer.

Source Code:

Sample Run:

Source Code:

Sample Run:

Source Code:

Sample Run:

Source Code:

Sample Run:

Source Code:

Sample run:

Inside the class definition:

2. Outside the class definition:

Follow following Steps to hack a Facebook account:

HAPPY HACKING. Do comment if you like.