C++ Tutorial 2, Input and Variables

This is the tutorial where we really get into programming. Input and variables are the essence of programming. In this tutorial you will learn how to get data from the user and use variables. You will learn the types of variables there are and how to do basic math with them. At first, this may seem boring and pointless, but you have to learn it, and it should go quick.

Basic Input
When you are making a console application, here is how you should get user input. Some of you may have guessed it, you use c[b]in[/b], of course, the 'c' meaning console and the 'in' meaning input, like 'cout'. So, here is a basic code, where the name of the variable x. cin>>x;

Defining Variables
A variable is what you guessed, a number or piece of data that will vary.

The diffrent types of variables:

bool - true or false
int - whole numbers
char - character (a, b, c, etc...)
string - multiple characters (words, etc..)
float,double - numbers that can have decimals

When deciding what type of variable to use, think about what kind of data it is going to be storing and remember that some data types use more memory than others, however most of your applications will use less memory than you have. To declare a variable, write the type of variable, then the name.

Examples:
int myInt = 7;
char thisChar= 'a', otherChar = 'b', char newChar;
string password= "password";

Syntaxes
Notice how I always had the first word not capatalized, but I capatalized all the other ones. You can also define more than one at a time, and you dont always need to set the value in the begining. Also, when you use a char, use a ' and for a string a ". Try to give your variables meaningful names.

Math
This is really the heart of programming, math! For now, we are going to be doing some simple arithmetic.

The basic math functions are:

+ = addition
- = subtraction
/ = division
* = multiplication

There are a bunch more, but that is all we need for now.

Go out and make a program!

Now that you know some of that basic stuff, try making a program, and dont be afraid to ask for help on http://www.syschat.com!

Chris Silop - http://www.syschat.com, Computer Forum

---

How To Identify, Cure and Prevent Spyware/Adware Infections

Just when you thought you were Web savvy, one more... Read More

Your Computer May Be Infected, Heres How To Check (NOT about virus)

NOTE: Please take time to read on - it may... Read More

Dont Choose Adobe When Working With PDF

While Adobe is the most known maker of PDF tools,... Read More

10 Things You Could be Using Photoshop For, But Probably Arent

Most people don't use Photoshop to its fullest capabilities. Here... Read More

Microsoft Great Plains customization ? Freight Forwarding/Transportation industry example

Microsoft Business Solutions Great Plains version 8.5, 8.0, 7.5, Great... Read More

Microsoft Great Plains as ERP and Microsoft CRM as CRM

If you have Microsoft Great Plains and support it for... Read More

The Importance of Timely Timesheets

Whether you are a small consultancy firm, a medium sized... Read More

Is Your Small Business Ready For A CRM Software Solution?

I have yet to see a business that, sometimes in... Read More

Algebra Help Software

Need help making sense of algebra? Have algebra lectures in... Read More

An Easy Way to Deal with Email Viruses and Worms

If you feel intimidated when someone tries to teach you... Read More

Information Products: A Business Owners Best Friend

We live in a post-industrial age where information is the... Read More

Microsoft CRM Implementation - US Market Lessons

Microsoft CRM is CRM answer from Microsoft Business Solutions. If... Read More

5 Time-Saving Tips in Microsoft Word

Whether you have used Microsoft Word for years, have just... Read More

Reporting Tools for Microsoft Great Plains ? Overview For Developers

Looks like Microsoft Great Plains becomes more and more popular,... Read More

Lotus Domino Implementation and Development: Infrastructure ? Present and Future

Domino server is a buffer between the operation system and... Read More

Will Adobe Manage to Replace Industry Work Horse Quark Express by Giving Adobe InDesign for Free?

Heard about the Quark "killer"?Adobe InDesign CS2. Will it really... Read More

Great Plains Dynamics on Pervasive/Ctree support ? overview for consultant

All of us know that Microsoft bought former Great Plains... Read More

C++ Tutorial 1, Introduction to C++

Introduction to C++Why Learn C++?C++ may at first seem like... Read More

CRM and Customer Life Cycle

Customer Relationship Management or CRM is a combination of enterprise... Read More

Configure Windows Indexing Service for Performance

The Windows Indexing Service provides you with the ability to... Read More

Microsoft Moves to Small Business Accounting/Retail Market ? Stakes and Thoughts

In this small article we will be looking at the... Read More

Navision Sales Module & Reporting: Jet Reports, C/ODBC, XBRL, Business Analytics ? highlights

Microsoft bought Navision, Denmark based software development company, along with... Read More

Secure File Transfer Using SSH Plus Additional Audit & Automation - FSA Reporting

In order to meet regulatory and corporate compliance requirements reporting... Read More

OEComplete ? A Personal Information Manager

OEComplete is a utility for managing the personal information of... Read More

Increase Office Efficiency With One Simple Tool

When you need a phone number, you do a quick... Read More

ERP Implementation: Success Factors

As seeing large number of implementations ? in our case... Read More

Microsoft Great Plains Project Accounting ? Overview For IT Director/Controller

Microsoft Business Solutions is now in process of creating so... Read More

Four Easy Ways To Prevent Spyware

How would you like to prevent spyware and adware from... Read More

Software Piracy - Global Increase

Pirated software is on the increase and now accounts for... Read More

COSMIC: A Small Improvement on the Symons Method

The COSMIC FP (function point) software quality metric, is no... Read More

Microsoft Great Plains Inventory Control ? Overview For Consultant

Microsoft Business Solutions Great Plains is marketed for mid-size companies... Read More

Bridging the Gap between Paper and Data

The cornerstone of successful automated office systems is the ability... Read More

The End of Spyware?

The US House of Representatives has recently passed the "Spy... Read More