Hi,
I have just started learning C++ and have been trying to do simple
string manipulation. However, when calling this function:
int helloString()
{
string name;
cout << "Please enter your name:\n";
getline(cin, name);
cout << "Length of string: " << name.length() << "\n";
return 0;
}
The compiled program gives absolutely no control for the user to type
the string in, so the length of it is always zero. helloString() is
called out of main() in a switch() statement [if that knowledge helps].
So does anyone know what the problem is, and why it won't let me type
anything in befere continuing as normal?
Thanks,
Vladimir Lushnikov 7 2449
Vladimir Lushnikov wrote: The compiled program gives absolutely no control for the user to type the string in, so the length of it is always zero. helloString() is called out of main() in a switch() statement [if that knowledge helps].
The way to track down the cause of this sort of problem is to simplify.
Remove the switch and call the function directly; if that does the same
thing, then the problem is in the function; if it works right, the
problem is elsewhere.
--
Pete Becker
Dinkumware, Ltd. ( http://www.dinkumware.com)
"Vladimir Lushnikov" <vl****************@gmail.com> wrote in message
news:11**********************@g44g2000cwa.googlegr oups.com... Hi,
I have just started learning C++ and have been trying to do simple string manipulation. However, when calling this function:
int helloString() { string name;
cout << "Please enter your name:\n"; getline(cin, name);
cout << "Length of string: " << name.length() << "\n";
return 0; }
The compiled program gives absolutely no control for the user to type the string in, so the length of it is always zero. helloString() is called out of main() in a switch() statement [if that knowledge helps].
So does anyone know what the problem is, and why it won't let me type anything in befere continuing as normal?
Thanks, Vladimir Lushnikov
If by chance you're using Visual C++ 6.0, there is a known problem with
std::getline() in that compiler's Standard Library implementation. A fix is
available (ask for more info if you're on that platform). If you're on any
other platform, please disregard this reply.
Vladimir Lushnikov wrote: The compiled program gives absolutely no control for the user to type the string in, so the length of it is always zero. helloString() is called out of main() in a switch() statement [if that knowledge helps].
So does anyone know what the problem is, and why it won't let me type anything in befere continuing as normal?
Thanks, Vladimir Lushnikov
I suspect you do something like cin >> choice; switch( choice ) in your
code before this. If so read this http://groups-beta.google.com/group/...4f10305a600bcc
Regards,
Vyacheslav
Yes, I am using both Visual C++ and cin >> choice;
I also tried this in Cygwin-GCC and it is the same problem. Adding
cin.ignore(numeric_limits<streamsize>::max(), '\n');
did solve the problem.
Thanks
"Vladimir Lushnikov" <vl****************@gmail.com> wrote in message
news:11**********************@g49g2000cwa.googlegr oups.com... Yes, I am using both Visual C++ and cin >> choice;
I also tried this in Cygwin-GCC and it is the same problem. Adding
cin.ignore(numeric_limits<streamsize>::max(), '\n');
did solve the problem.
Thanks
Have a look at: http://www.dinkumware.com/vc_fixes.html
Look at the section entitled "Fix to <string>".
Dave wrote: "Vladimir Lushnikov" <vl****************@gmail.com> wrote in message news:11**********************@g49g2000cwa.googlegr oups.com...
Yes, I am using both Visual C++ and cin >> choice;
I also tried this in Cygwin-GCC and it is the same problem. Adding
cin.ignore(numeric_limits<streamsize>::max(), '\n');
did solve the problem.
Thanks
Have a look at:
http://www.dinkumware.com/vc_fixes.html
Look at the section entitled "Fix to <string>".
That patch is always a good idea, but it's not related to the original
question.
--
Pete Becker
Dinkumware, Ltd. ( http://www.dinkumware.com)
I'm using the Visual Studio.NET 2005 Beta 2 :)
Thanks for your help everyone. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: Frank Schmitt |
last post by:
Hi!
I've just been bitten by the famous Windows newline issue, i.e.
tried to read a textfile written by a windows application on
an unix platform. When reading a line with
...
|
by: sam |
last post by:
Hi,
How can I use getline ignore the commandline arguments?
Thanks
Sam
|
by: jalkadir |
last post by:
I am trying to get character string from the user, to do that I use
getline(char_type*, streamsize), but I get a segmentation fault??!!
Can anyone give me a hand, what am I doing wrong?
--snip...
|
by: aGAric |
last post by:
i use std::getling to read a line in unicoude file to buffer,like:
WCHAR buf
wifstream in;
std::getling(buf,in,100);
but i can't get the right result,it seems can only read by 1 byte;e.g first...
|
by: Bit Byter |
last post by:
I have a method in a class implemented like this:
int foo (const char* filename, bool flg)
{
FILE *fp;
char *buffer, *tokstr, *tmp;
size_t size, toksize;
unsigned int i;
if ((fp =...
|
by: Chris |
last post by:
Running into a problem on Windows. This code
std::string randomStuff;
std::getline(std::cin, randomStuff);
works on unix, but on windows, it requires the user to hit the enter
key *twice*...
|
by: Kevin Eller |
last post by:
I haven't used std::getline for a long time, if someone can help me
|
by: toton |
last post by:
Hi,
I am reading some large text files and parsing it. typical file size
I am using is 3 MB. It takes around 20 sec just to use std::getline (I
need to treat newlines properly ) for whole file in...
|
by: JML |
last post by:
Hi,
I have some code which parses a text file and creates objects based on
what is in the text file. The code works just fine on Windows, but when
I compile it using XCode on OS X the parsing...
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
|
by: emmanuelkatto |
last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud.
Please let me know.
Thanks!
Emmanuel
|
by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
|
by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers,...
| |