Valid STL Clause 3, valid tivestl Clause 3

Valid STL Clause 3, valid tivestl Clause 3
Make sure that the objects in the container are copied correctly and efficiently.

When using the STL template, we must think about the copy issue. If STL stores custom types. The following problems may occur:

First

To avoid the copy process from becoming a bottleneck in program operation, we choose to store custom pointers. However, the wild pointer problem is easy to occur here, so we need to use the smart pointer shared_pre to avoid it.

Next

If the storage type is the base class, when we store the derived class, truncation occurs, that is, only the base class is copied, and the derived class is lost.

Last

Compared with arrays, vector has its own uniqueness. The most obvious difference is the dynamic growth of length.