Solved

istream buffer

Posted on 1997-10-03
2
327 Views
Last Modified: 2006-11-17
int n;
cin >> n;

As the above code, I have declarced an interger variables n.
I try to input the value of n by cin. However, when I try to input a chracter as the input prompt. An error occur. The value of n is not changed.
I know that I can detect the invalid input using the cin.good().... I also try to use the cin.ignore() to delete the invalid character input from istream but fail to do this. Then how can I do to flush the istram so that the character from istream?
0
Comment
Question by:matchz
2 Comments
 
LVL 1

Accepted Solution

by:
ohell earned 100 total points
ID: 1170802
Looks to me like you have an eof condition. you make sure that
cin.rdstate() & ~eofstate

If the eof is not true, you can flush the stream by cin.tie()->flush()

Hope this helps
0
 

Author Comment

by:matchz
ID: 1170803
Then can I use cin.flush() ?
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: SunnyDark
This article's goal is to present you with an easy to use XML wrapper for C++ and also present some interesting techniques that you might use with MS C++. The reason I built this class is to ease the pain of using XML files with C++, since there is…
Many modern programming languages support the concept of a property -- a class member that combines characteristics of both a data member and a method.  These are sometimes called "smart fields" because you can add logic that is applied automaticall…
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.

839 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question