i have a problem please help me with a c++

Question

i dot no understand std in c ++

Answer 1

std is the standard namespace, which is basically just an identifier to prevent declarations from the standard library to conflict with your own declarations.

You can read up more on namespaces here:

https://en.cppreference.com/w/cpp/language/namespace

https://www.tutorialspoint.com/cplusplus/cpp_namespaces.htm

Also, the following threads might be able to help you:

https://www.sololearn.com/discuss/1559462/?ref=app
https://www.sololearn.com/discuss/1821432/?ref=app
https://www.sololearn.com/discuss/905774/?ref=app
https://www.sololearn.com/discuss/75637/?ref=app