Clause 18: Make the interface easy for proper use, not easy to misuse (made interface ease to using correctly and hard to uses incorrectly)

Note:

1. Good interfaces are easy to use and are not easily misused. All interfaces should be made to strive to achieve these properties.

2. The "promote proper use" approach includes interface consistency, as well as the built-in type of behavior compatibility.

3. The "block misuse" approach includes the creation of actions on new type/restriction types, the binding of object values, and the elimination of customer resource management responsibilities.

The 4.TR1::SHARED_PTR supports custom deleter. This prevents DLL problems and can be used to automatically unlock mutexes (Mutexs) and so on.

Clause 18: Make the interface easy for proper use, not easy to misuse (made interface ease to using correctly and hard to uses incorrectly)