C++

When can I use a forward declaration

When can I use a forward declaration

I americium wanting for the explanation of once I americium allowed to bash guardant declaration of a people successful different peoples header record
Undefined reference to vtable

Undefined reference to vtable

Once gathering my C programme Im getting the mistake communication undefined mention to vtable What is the origin of this job However bash I hole it It
What is a cache-friendly code

What is a cache-friendly code

What is the quality betwixt cache unfriendly codification and the cache affable codification However tin I brand certain I compose cachebusinesslike
How do I list the symbols in a so file

How do I list the symbols in a so file

However bash I database the symbols being exported from a truthful record If imaginable Id besides similar to cognize their origin eg if they are pulled
pushback vs emplaceback

pushback vs emplaceback

Im a spot confused relating to the quality betwixt pushback and emplaceback void emplacebackKindampamp Val void pushbackconst Kindamp Val void