Comments on: 1.3 — A first look at variables (and cin)

By: ramesh

ramesh — Tue, 07 Sep 2010 09:19:44 +0000

plz send to me cpp software download link

By: UnderMotion

UnderMotion — Tue, 24 Aug 2010 14:29:55 +0000

 using namespace std;

should be in between the brackets in main()
Try it out ;)

By: Adam Sinclair

Adam Sinclair — Mon, 16 Aug 2010 16:56:12 +0000

You forgot the

int main()

You just have:

main()

By: Adam Sinclair

Adam Sinclair — Mon, 16 Aug 2010 16:50:09 +0000

#include "stdafx.h"
#include 

using namespace std;

int main()
{
int x;
cout << x << endl;
}

When I run this with Visual C++ 2008, the console opens up and it doesn't say anything. Only says: Press Enter to continue...

By: chris

chris — Wed, 28 Jul 2010 18:15:42 +0000

it’s the cout and cin code that’s having problems everything else works

By: chris

chris — Wed, 28 Jul 2010 17:59:45 +0000

it keeps saying this is an error cout << "You entered " << x << endl; on visual studios 2008 any advice

By: chris

chris — Wed, 28 Jul 2010 17:51:54 +0000

the code before the quiz code wont work for me , I have visual studios 2008 it keeps saying I have four errors can you help me

By: sega

sega — Thu, 15 Jul 2010 04:53:31 +0000

When assigning a number to “x” I can’t assign the number “9999999999″ to it. I figure that it is too large of a number. Is there a way to get around this?

By: Solomon Homicz

Solomon Homicz — Fri, 21 May 2010 17:35:31 +0000

I’ve got a problem nobody else seems to have. I’m following this tutorial with both an IDE and a text editor/command terminal. I’m running Ubuntu 10.04 with Qt Creator for an IDE, and gedit for an editor.
When I compile the gedit version of the program manually using “g++ -o first first_C_prog.cpp” it runs and works just fine.
When I build essentially the same code in the IDE it builds fine and runs but when I put in a number and hit enter it just goes to a new line. It doesn’t display anything back to the screen and keeps running, I have to kill it manually.
Here’s the code, the only difference is in the manually compiled version I remove the #include Qtcore (seems like the same thing as stdafx.h).

#include 
#include 

int main ()
{
        using namespace std;
        cout << "Hello World!" << endl;
        int x = 0;
        cout << "Enter a number: ";
        cin >> x;
        cout << "Your number is: " << x << endl;
        return 0;
}

I’m going to dig into the IDE help next, and see if I can figure it out. I’m an engineering student and have been programming extensively in Fortran, so an editor and terminal is just fine by me, but I think an IDE is going to be essential if I want to make a jump to GUI applications.
The professors say “if you can program in Fortran you can program in anything”, and it seems like C++ is the backbone of just about everything. Most people don’t care about things like Romberg integration or finite difference in a 3d matrix they just want a pretty window on their computer screen that gives them an answer. So, I’m off to learn C++ and this is the best tutorial I’ve found, thanx Alex.
Anybody have suggestions on how to make this IDE behave?

By: Kurt

Kurt — Fri, 23 Apr 2010 11:54:03 +0000

#include “stdafx.h” // Uncomment if Visual Studio user
#include

int main()
{
using namespace std; // gives us access to cout and endl
int x; // declare an integer variable named x

// print the value of x to the screen (dangerous, because x is uninitialized)
cout << x << endl;
}

This code of yours, which is supposedly to give an output of “8589934960″ also worked on mine. I am using Visual Studio 2008 on a Windows 7 OS.

Thanks man!