C++

[Time]

So I'm learning C++, my first language I'm learning. Now, I'm working with this code:

#include <iostream>

using namespace std;

int main()
{
int y;

cout<<"Please enter a number: ";
cin>> y;
cin.ignore();
cout<<"You entered: "<< y <<"\n";
cin.get();
}

It runs fine, but if I randomly type in a number with a large amount of value places, the number the program tells me I typed in is incorrect. The number it gives me usually starts with 21473, but then will go on for a couple of more value places. I don't understand how it could get this wrong, and if someone can explain, it'd be appreciated.

[Forever Atlas]

lol... C ++ yay.... >.> the next class I have to look forward to lol.... I already graduated from one thing and got my degree... next thing... great, well at least that wont be untill the fall :-p

[Time]

...how does that help me at all?

[Petie]

How many places are you using in your random large numbers? Since your data type is int, there is a limit to how large a value it can hold. In general, this value is 2,147,483,647 so if you're going larger than that, it won't work correctly. Here's a little more technical info if you're curious:

Your default int type is called a signed integer. It can range from -2,147,483,648 to 2,147,483,647 (signed means it can be positive or negative). You can also have an unsigned integer which has a range from 0 to 4,294,967,295. I haven't done much C++ recently but if I remember correctly, to make an unsigned int, just add the modifier unsigned in front of the variable declaration (i.e. unsigned int y;).

I hope this helps. Let me know if you need anything else. I've got quite a bit of experience in both C++ and Java - I just need to refresh my memory a bit.