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C++ Computer Programming [Tutorial #2] Input/Output
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C++ Computer Programming [Tutorial #2] Input/OutputPosted:

HTTK
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Welcome to my C++ Programming Tutorials!

Part 2: Input/Output

We will start by adding the same library's and namespace along with the main function.
#include <iostream>
using namespace std;

int main(){

}

"iostream" is the input/output library which is exactly what we will be doing.
We are going to make a simple program the ask the user to input a number.
Then the program will output the users input.
We will now have to declare a integer in the main function.
We do this by typing "int" followed by what ever you wanted it to be called.
I am going to make mine simply and name it "userInput"
Try to always make the names make sense as it will help you later on.
Here is what it should look like:
#include <iostream>
using namespace std;

int main(){

int userInput;

}
Notice how made the "I" in input capital and "user" lowercase.
This is called camel case and it is not required but good style!
Now we will use what we know from TUT#1 to output some text using the "cout" command.
We will also add system("pause"); before I forget!
Here is what you should have:
#include <iostream>
using namespace std;

int main(){

int userInput;

cout << "Enter a integer: \n";

system("pause");

}
If you were wondering what "\n" is, it just simply ends the line.
Much like typing enter on a keyboard.
Now we need to add code to allow the user to input a number.
We will be using the code "cin"
This one is fairly simply just do as I have:
#include <iostream>
using namespace std;

int main(){

int userInput;

cout << "Enter a integer: \n";
cin >> userInput;

system("pause");

}
Notice the ">>" we used are different than before.
That is because we are inputting not outputting.
Then we simply state what variable we want the integer to be saved to!
Now we have one last thing to do and that is to output our "userInput"
We will again be using "cout" command but instead of typing out what to input we simply tell the program to output "userInput"
#include <iostream>
using namespace std;

int main(){

int userInput;

cout << "Enter a integer: \n";
cin >> userInput;

cout << "You entered: " << userInput << "\n";

system("pause");
return 0;
}
We had to add the "<<" again after the text to show we are outputting another line of code.
Also I have added "return 0;" which I explain in part 3.
Also ended the line of code for style.
Hope you enjoyed!
Part 3 will be soon!

The following 1 user thanked HTTK for this useful post:

Dusknoir (03-29-2015)
#2. Posted:
UnrealApp
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Perfect, I have been trying to get some knowledge of C++ to see if I can play around with CS:GO. Not aimbot, more of a less cheat worthy script.
#3. Posted:
ip
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You can also remove the "int" and rename it to "void" to allow it to run without the "return 0;" as I see it as messy. But that's just my opinion.
#4. Posted:
ObscureCoder
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Please stop teaching these bad habits.

1) Use return 0; in your main method (on all examples).
2) Don't use system("pause"); - windows specific. Use cin.ignore().get();
3) Why use "\n" when you can use endl ?
#5. Posted:
HTTK
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ObscureCoder wrote Please stop teaching these bad habits.

1) Use return 0; in your main method (on all examples).
2) Don't use system("pause"); - windows specific. Use cin.ignore().get();
3) Why use "\n" when you can use endl ?


Please stop commenting. These are short tutorials and aren't meant to be for professional use.
I know c++ well and I was taught this way and later was taught the proper way.
This tutorial assumes that the person doesn't know any programming language.
Therefore I am making it simple as possible.
#6. Posted:
ObscureCoder
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Seize_The_Day wrote
ObscureCoder wrote Please stop teaching these bad habits.

1) Use return 0; in your main method (on all examples).
2) Don't use system("pause"); - windows specific. Use cin.ignore().get();
3) Why use "\n" when you can use endl ?


Please stop commenting. These are short tutorials and aren't meant to be for professional use.
I know c++ well and I was taught this way and later was taught the proper way.
This tutorial assumes that the person doesn't know any programming language.
Therefore I am making it simple as possible.


If you have the audacity to teach, you should have knowledge to teach it correctly.
I'm sure you're an expert at C++ (jking I think you've barely touched the language).
Simple != Wrong.
#7. Posted:
AR15
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Seize_The_Day wrote
ObscureCoder wrote Please stop teaching these bad habits.

1) Use return 0; in your main method (on all examples).
2) Don't use system("pause"); - windows specific. Use cin.ignore().get();
3) Why use "\n" when you can use endl ?


Please stop commenting. These are short tutorials and aren't meant to be for professional use.
I know c++ well and I was taught this way and later was taught the proper way.
This tutorial assumes that the person doesn't know any programming language.
Therefore I am making it simple as possible.

Although I do not know a lot about programming in this language, you really DO need to write tutorials in the correct fashion instead of teaching users bad habits that they will later need to break. So what if the proper way is a little harder? You will learn much more easily once you have the proper method down.
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