How do I flush the cin buffer?

c++ cin io-buffering
Tal picture Tal · Nov 2, 2008 · Viewed 309.1k times · Source

How do I clear the cin buffer in C++?

Answer

Martin York picture Martin York · Nov 2, 2008

I would prefer the C++ size constraints over the C versions:

// Ignore to the end of file
cin.ignore(std::numeric_limits<std::streamsize>::max())

// Ignore to the end of line
cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n')

Related questions

When and why do I need to use cin.ignore() in C++?

I wrote a very basic program in C++ which asked the user to input a number and then a string. To my surprise, when running the program it never stopped to ask for the string. It just skipped over it. …

Read More
Why would we call cin.clear() and cin.ignore() after reading input?

Google Code University's C++ tutorial used to have this code: // Description: Illustrate the use of cin to get input // and how to recover from errors. #include <iostream> using namespace std; int main() { int input_var = 0; // Enter the do …

Read More
Checking cin input stream produces an integer

I was typing this and it asks the user to input two integers which will then become variables. From there it will carry out simple operations. How do I get the computer to check if what is entered is an …

Read More