Use the design mode to solidify your C # Program (6-1)

Use the design mode to solidify your C # Program (6-1)

Design Patterns: Solidify Your C # Application Architecture with Design Patterns Chinese edition (Part 2)
Author: Samir Bajaj
Translator: glory

[Translation: C # advanced article. The translator simply sorts out the C # examples provided by Samir (some of the Code provided by the author cannot be compiled in the translator's environment) and compiles the corresponding C ++ example, put them in comments for readers to compare. All C # And C ++ debugging environments are Microsoft Visual Studio. NET 7.0 Beta2]

C ++ example: [Note: Because the code in this example is relatively complex, the class declaration and definition are separated from J]

State. h
# Include "stdafx. h ";
Class State;
Class VendingMachine;
Class Start;
Class Five;
Class Ten;
Class internal tee;
Class Twenty;
Class State
{
Public:
Virtual void AddNickel (VendingMachine * vm ){}
Virtual void AddDime (VendingMachine * vm ){}
Virtual void AddQuarter (VendingMachine * vm ){}
Protected:
Virtual void ChangeState (VendingMachine * vm, State * s );
};
Class VendingMachine
{
Private:
State * state;

......

Delete Start: Instance ();//@
Delete Five: Instance ();//@
Delete Ten: Instance ();//@
Delete deleteen: Instance ();//@
Return 0;
}
/* The following is the output result of a running task:
The Vending Machine is now online: product costs 25c
Credit: 0c
Insert a coin <5, 10, 25>: 5
Credit: 5c
Insert a coin <5, 10, 25>: 10
Credit: 15c
Insert a coin <5, 10, 25>: 5
Credit: 20c
Insert a coin <5, 10, 25>: 5
Dispensing product... Thank you!
*/
]

Conclusion

The design model draws on the essence of years of experience in solutions to common problems in object-oriented software design. Regardless of the scale of the project, they provide answers to the problems most software developers encounter. C # increases the productivity of programmers, adds features that can promote object-oriented design, and reduces the manual labor burden of developers. The combination of the two is always unfavorable.