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what's going on guys? welcome back to the fourth c plus plus a tutorial and
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in the store, I'm gonna be going over something called variables because
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variables are such huge
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part of C plus plus I can't stress this enough. So, let's go ahead and tap into
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our memory banks
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and try to remember back in like 7th grade when you first start learning
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about
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variables and if you can remember let me give you a brief history lesson
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variables are basically just place orders
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thats all they are so ask go ahead and say we had a very poor
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name X and we said equal to bacon
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well then whenever we would have a sentence like bucky
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loves X we knew that X because bacon said this man
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bucky loves bacon simple enough so let me be guys another quick example say X
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was equal to
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7 so then when we had a statement like
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5 plus axe we know that this man 5
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plus 7 simple enough so as you can see
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a variable is basically just a place order
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now let me go ahead and shake us how to make
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variables in C pas plus and C plus plus
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in order to make variables you go ahead in first grade
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type variable you're gonna be working with now I'm gon be going over data
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types
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later but for now I want to give the as one data typing that's I
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an T this stands for integer and and injures pretty much like a whole number
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like six
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83 540 is a number without a decimal place
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so now that you gave c plus plus
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type up daddy you can be working with you need to go ahead and name your
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variable
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go ahead in a min anything you want I'm no head in a mind to know
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somehow has a type and the name
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so now all we have to do is used the equal sign and set it equal to a value
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so says a Sikh has to be go to a whole number but said equal to 6%
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arm it doesn't matter what ornery said equal to book acts like six
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it's easier to type so now we have the variable tuna
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and she passed person knows that it's an integer
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and it's equal to the value of six so now what can we do with variables
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or just like we can print out tax on the screen we can also print out
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variables just as easy so if you wanna head and said see out
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and just go ahead and print out tuna we can go ahead and build and run this
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and it would print now not to work tuna but it would print out
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6 just like that so that's pretty cool and that's the basics
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variables and how we can use variables
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c plus plus and actually in this is 40 hours planning on doing
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is building a simple calculator arm
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let me go ahead and I guess have time for this
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let's go ahead and make two variables and I'll show you guys
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another cool thing they can do the C pas plus let's go ahead and make
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aunt will call make a verbal called a in all city
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24 let's go ahead and make another variable called be
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which is of course an integer because it's only type we know right now
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and offset the sequel to you know 21 or something doesn't matter as long as
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you're both numbers
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now let's go ahead and make another variable
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called some and thus some is going to be equal to
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a plus be so now you can see
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aside from osco head and yeah
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as gonna so now you can see there aside from just
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assigning variables numbers just like that
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you can also use basic arithmetic to set
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variables eager to another value as well so now the value of 25
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a poss be is going to be equal to some
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so now if you go ahead and print out see out some
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and then go ahead and build and run this check it out
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prints out twenty 5 on-screen pretty cool hot
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so again in the store I want to show you guys that
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in order to make variables go ahead and write the data type
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what do you want the name pair both org sees me what you want the name of the
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variable to be
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and while you want the value variable to be
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and then aside from just assigning variables basic values
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you can also use basic arithmetic like a poss be
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on B-minus a could done that on
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see if he had be minus a as go ahead and see what the value that is
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17 so again in go ahead and set variables equal to
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basic arithmetic using other variables and you can even
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do this some Eagles 48 minus
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arm 7 again this is a really some anymore
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it's Marv AR prod as not the product
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not the quotient the difference there we go that's why
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hand area I got it so again
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you understand the basics are variables that's what I'm trying to stress on the
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next oral
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one can be doing is I'm gonna be showing us how to make a very
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basic calculator and this is the first programmer can be building
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actually interact with the user and it's gonna be awesome
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and you needed to understand variables before I could show that TI so
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that's why I had to go over this store for now thank yasser watchin
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doc subscribe enough a check on my watch said the new bus in a cop
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it's awesome so anyway stink ass Russian and I'll see next video