Make Free Phone Calls Online

How to make free phone calls online?

Everybody loves to do free voice calls to their family members and friends, especially when they are in abroad. Here am listing some options for people who are all looking for free phone calls from PC/Laptops.

Free Phone Calls

i)      Google Voice Google Voice is the best way to make free calls online, but this is only for US and Canada. Check The Call Rates Here . Best Thing About Google Voice is it also helps you to manage the phone numbers you have.

ii)     Call2Friends Call2Friends is also a exciting site to make free calls from PC to Phone. But we can make 2 minutes Call for a day.

iii)   Rebtel 

We have to Register and download one application in order to make the free calls.

iv)     Voip Buster

Voip Buster is one more good application for making free phone calls from PC but they have a time limit of 60 minutes per day.

v)      Vopium 
we need to sign up from your number and then we will receive free 5 minutes talk time to make calls anywhere.

Please update in comments, if you find any other online sites or apps which will provide free phone calls from PC.

HOW TO FIND THE SERIAL KEYS OF DIFFERENT SOFTWARES FROM GOOGLE

A serial number is an alphanumeric identifier for your software that identifies and verifies it as a legal copy, and is often requested during installation or registration.

Follow these below mentioned steps to find the serial keys of a particular software for free.

Serial Key

i) Go to www.google.com webpage.

ii) Write down the name of the software which you want to get the key and add 94FBR at the end

Eg:  if you want to find key of IDM then write    "IDM 94FBR" (without quotes)

iii) Search it and you can find many sites with serial keys of those softwares

Hope this post helps you in finding the serial key for your software.

Find More tricks and tips @ Tips & Tricks.

Please comment for any additions or suggestions and Share this post with all your friends.

Find out the string length without using strlen() function and any loop.

We are having many methods to find the string length for a given string, like implementing the strlen() functionality using loop, etc..

Here in the below program, we are going to see some interesting logic which can give us the string length..

#include "stdlib.h"
#include "stdio.h"

int main()

{

//string length without using strlen() and loop.

     char str[150] = {0,};

     int length = 0;

     printf("Please enter a string:\n");

     gets(str);

     printf("\n\n");

     length = printf("%s", str);

     printf("\n\nLength of entered String is = %d", length);

     getch();

     return 0;

}

Output:

String length by printf()

Logic: We all know that printf() function returns the number of characters displayed(or printed ) on output screen. So using this logic we have found the string length for the entered string.

Read more about basics of Input/output functions.

Hope this Post recalled your basics once again..

Please share it with all your friends.

Post comments for any clarification and doubts. And also share your ideas/opinions as well.

Windows 8 OS Keyboard Shortcuts

Windows key – brings up the Metro start screen. You can start typing to search for an app, just like the Win7 start menu.

Windows 8 Shortcuts

Win + D – brings up the old Windows desktop.

Win + C – brings up the Charms menu, where you can search, share, and change settings.

Win + I – opens the Settings panel, where you can change settings for the current app, change volume, wireless networks, shut down, or adjust the brightness.

Win + Z – opens the App Bar for the current Metro application.

Win + H – opens the Metro Share panel.

Win + Q – brings up the Metro App Search screen.

Win + W – brings up the Metro Settings search screen.

Win + F – brings up the Metro File search screen.

Win + K – opens the Devices panel (for connecting to a projector or some other device)

Win + , (comma) – Aero Peek at the desktop.

Win + . (period) – Snaps the current Metro application to one side of the screen. (Right side)

Win + Shift + . (period) – Snaps the current Metro application to the other side of the screen. (Left side)

Win + J – switches focus between snapped Metro applications.

Win + Page Up / Down – moves the current app to the other monitor.

Win + Tab – opens the Metro application switcher menu, switches between applications.

You might notice that we didn’t show screenshots of how all these shortcut keys work, and there’s a reason for that: you need to test them out for yourself to really learn how they work.

Win+X – lunch kind of start menu, very useful

Windows Key + Print Screen saves a screenshot into your Pictures folder. It’s quite handy.

Please share if we missed any other shortcuts..

C Language Advantages

Advantages

Ø  C language is a base or building block for many other currently known languages.

Ø  C language has varieties of data types and powerful operators. Due to this, programs written in C language are efficient, fast and easy to understand.

Ø  C is highly portable language. C programs written for one computer can easily run on another computer without any change or by doing a little change.

Ø  There are only 32 keywords in ANSI C and its strength lies in its built in functions. Several standard functions are available for developing programs.

Ø  Another important advantage of C language is its ability to extend itself.

A C program is basically a collection of functions that are supported by the C library this makes us easier to add our own functions to C library. Due to the availability of large number of functions, the programming task becomes simple.

Ø  C Programming is a structured programming language. This makes developers to think of a problem in terms of function modules or blocks. The Collection of these modules makes a complete program or software. This modular structure makes program debugging, testing and maintenance more easier.

C vs C++

Disadvantages

Ø  There is no runtime checking in C language.

Ø  There is no strict type checking. For example, we can pass an integer value for the floating or character data type.

Ø  C does not have concept of OOPs, that’s why C++ is developed.

Ø  C does not have the concept of namespace.

Ø  C does not have the concept of constructor or destructor.

What is "void" type in C/C++ ?

Before going to the void data type, First let us understand the data type concept.

In C/C++ programming language, the data types refer to an extensive system used for declaring/defining variables/objects or functions of different types. The type of a variable determines how much memory space it occupies in storage and how the bit pattern stored is interpreted.

char, int, float, double, void etc.. are some of the data types in C language.

Data Types in C/C++

Now coming to the void data type..

void is basically a keyword to use as a placeholder where you would put a data type, to represent "no data".

void actually refers to an object that does not have a value of any type.

When "void" type is used in function definition it means that function will not return any value.

When "void" is used with pointer type variable declaration eg: void* a or void* b etc. It means any empty type i.e. later in the program you can point any data type(int or float type variable) to a or b respectively.

Click here for more C Tutorials and Concepts.