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One, const and static differences

A 1.const defined constant will be freed after its scope is exceeded, and static will not.

2.const is initialized in the constructor, and static is initialized in the implementation of the class.

3.const belongs to a member, and static belongs to a class.

4. Declare the local variable with static, make it static storage (static data area), scope unchanged, declare the external variable with static so that it is valid only within this file. When using static for function definitions, the function is only valid within this file.

5.const: The value is immutable.

Reference: 72821452 and https://www.cnblogs.com/hellocby/p/3543989.html

Second, the template

1. Definition: A template is a tool to implement the code reuse mechanism, which can implement type parameterization, that is, the type is defined as a parameter, thus realizing the real code reusability. Template can be divided into two categories, one is a function template, the other is a class template.

2. Reference: https://www.cnblogs.com/sevenyuan/p/3154346.html

Third, dynamic library and Static library

1. Definition:

Static libraries: links to libraries are done at compile time.

Dynamic libraries: When the program is compiled, it is not connected to the target code, but is loaded only when the program is running.

2. Reference:

Https://www.cnblogs.com/findumars/p/7128511.html

Iv. polymorphic

1. Introduction:

2. Reference:

52939323

"C + + problem grooming"