Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I got a program which contains a lot of std::cerr, it directly outputs to my terminal. I am wondering what is the difference between std::cerr and std::cout. And how can I disable the std::cerr (I don’t want it output to my screen)?
As others have mentioned, if this is a Unix-like system then 2>/dev/null redirects stderr (2) to the big bit bucket in the sky (/dev/null).
But nobody here has explained what the difference between stderr and stdout is, so I feel obligated to at least touch on the topic.
std::cout is the standard output stream. This is typically where your program should output messages.
std::cerr is the standard error stream. This is usually used for error messages.
As such, if your program “contains lots of cerr” output, then it might be worth taking a look at why so many error messages are being printed, rather than simply hiding the messages. This is assuming, of course, that you don’t just happen to have a program that emits lots of non-error output to stderr for some reason.