what is the difference between the output of online ide and output of eclipse and visual studio ?

[Mikenuaimi]

I am new on c++, Please see this screen shot for what I get from ideone.com

http://s33.postimg.org/58bxsow8v/ideone.png

you can see the output is a random number result from cin >> number;
, but when I use visual studio or eclipse doesn't show me the same output which is the random number number=-1219862963

#include <iostream>
using namespace std;

int main(void) {
    int number;
    cin >> number;//this is generate a random number but I am not sure if I am right about this.
    cout << "You typed the number " << number << endl;// this should show me the number but it didn't.
    cin.get ();
    return 0;

}

[Moschops]

cin >> number;

//this is generate a random number but I am not sure if I am right about this.

You're wrong about this.

It fetches a value from the input. typically, from the keyboard.

When using ideone, because you don't have access to the keyboard (because it's running on a server somewhere on the internet), the input is instead gathered from you before you run the program. See the button marked "stdin", on the first page ( https://ideone.com/ ) ? Push it. Then you can enter the input for cin.

If you don't supply anything, ideone will supply something for you. Could be anything. It's not random.

[Chervil]

Presumably if you don't supply any input, the cin >> will fail with an end-of-file condition and number will be unchanged. Since it was not initialised, it contains garbage.

[Moschops]

What Chervill said. I've no idea what happens on ideone if you don't provide the input. They could do whateve rthey like, really.

[Mikenuaimi]

Thank you guys that was very helpful..