C++ Input Problem

[kavingasc]

I have a problem in the following c++ program,while getting a input '08' and '09' it skip the next immediate input value. Why it is happening if you know the reason please send to me..

#include<iostream.h>
#include<conio.h>
void main()
{
int a,b,c;
cout<<"Enter the  value for a"<<endl;
cin>>a;
cout<<"Enter the Value for b"<<endl;
cin>>b;
cout<<"Enter the value for c"<<endl;
cin>>c;
getch();
}

Sample Input(with problem)

Enter the value for a
08
Enter the Value for b
Enter the value for c

Sample Input(without problem)

Enter the value for a
03
Enter the Value for b
05
Enter the value for c
07

[Catfish2]

Please use code tags when posting source code. (See right toolbox when posting for <> button.)

From the way your program looks, you're using Borland C or some other antique compiler.
There are better alternatives, which are free:
http://www.microsoft.com/visualstudio/en-us/products/2010-editions/visual-cpp-express
http://www.bloodshed.net/devcpp.html (old but smaller)

Your program should look like:

#include <iostream> // modern headers do not have .h extension
// conio.h is not standard

int main() // void main() is not standard
{
    int a, b, c;

    // C++ uses the std:: namespace
    std::cout << "Enter the value for a" << std::endl;
    std::cin >> a;
    std::cout << "Enter the Value for b" << std::endl;
    std::cin >> b;
    std::cout << "Enter the value for c" << std::endl;
    std::cin >> c;

    // getch() is not standard
}

The program above compiles fine in Visual Studio 2010 Express and has no input errors.

[viliml]

http://www.bloodshed.net/devcpp.html

No, no way, bad idea, just.. NO! bloodshed Dev-C++ is as bad as the name "bloodshed"(spilling blood)!!!! Use this instead: http://orwelldevcpp.blogspot.com/2012/06/dev-c-5203-released.html It is a much newer version, and is much better. The Bloodshed version is old and deprecated (http://www.cplusplus.com/articles/36vU7k9E/) But the Orwell upate is just AWSUM!!!

[Caligulaminus]

Seems like your input gets interpreted as octal due to the leading zero.
There is no digit '8' or '9' in octal notation.

Try
std::cin >> std::dec >> a;
instead.

[viliml]

Those problems can wait, he HAS to upšgrade his IDE and compiler!

[kavingasc]

Catfish2 , While using a visual c++ i can use iostream header file (instead of iostream.h) and name space std. But i can't use it in Turbo c++. Now that is not a matter, I like to know the reason for above mentioned problem.
Even Visual C++ Complier also produce the same problem when i using a iostream.h file.

[viliml]

OMG turbo c++....

Wikipedia wrote:

Stable release 2006 / September 5, 2006

Do you realize you are using an IDE SIX YEARS OLD?!!?!?!?!?!??!!?!!!

[kavingasc]

Thanks Caligulaminus, In octal 10 and 11 also don't have a digit. but i am giving input like '010' ,'011', '012' etc. It gets a input without skipping.

But i am giving a input '018','019','028','029' same problem will exist.

Regards.
Kavin

[Caligulaminus]

Octal notation knows the digits '0'-'7'. '8' and '9' are not allowed!
Either omit the leading '0' or tell cin to read as decimal.

And yes - get a newer compiler/IDE.