systems engineering principles and practice

Chen Shuo (giantchen_at_gmail) Blog.csdn.net/solstice Abstract: As the author of the C ++ dynamic library, virtual functions should be avoided as the library interface. This will cause a lot of trouble to maintain binary compatibility. We have to add a lot of unnecessary interfaces and eventually repeat the same mistakes of COM. This article mainly discusses the Linux X86 platform, and will continue to use Windows/COM as a negative teaching material. This article is a continuation of the

differences? Different semantics. ADT is usually a value semantics, while object-based is an object language. (For the definitions of these two semantics, see the previous article "C ++ Engineering Practice (8): Value Semantics"). The ADT class can be copied, And the copied instance is out of the original instance. For example, stack a; a. push (10); stack B = a; B. pop (); at this time, there are still 10

Software Engineering--the design of the face object of theory, method and practiceIn the phase of object analysis, it is necessary to focus on what the system does, while in the design phase, it will focus on the software implementation of the system, including architecture design, detailed design, user interface design and database design.For large complex systems, the design of software architecture is pa

unit testing work.Programming language has been evolving and evolving, and its development has undergone a process from machine language to high-level language. The program designer should choose according to the requirements.In the early days of computer development, it was thought that programs were provided to machines rather than read by people. Therefore, it is sufficient to implement the correct logic so that the computer executes, and whether it is irrelevant to use a unified programming

, boundary condition test, Duan Yuancan Villager test method.Integration testing: Top-down testing, bottom-down integration.System test: Recovery test, safety test, strength test, performance test.Software debugging: A simple Debugging method (1. inserting a print statement into the program; 2. Run part of the program;3. with Debugging Tools), inductive debugging, deduction, debugging, backtracking method debugging. Iv. Software Testing methods: Static test and dynamic test, black box test and w

Errors are the properties of the software and cannot be changed. Testing is the inspection and evaluation of the quality of software products. The basic principles of software Testing: ① Software testing as early as possible, ② avoid checking their own programs, ③ test cases include reasonable input conditions and unreasonable input conditions; ④ test cases should include testing the input data and corresponding expected output, ⑤ pay attention to the

environment.A: Pressure everyone will have, it is a double-edged sword, is good or bad depends on your understanding of it. When we are faced with danger and challenge, human instinct will feel the pressure, and stress will put our body and brain in a state of excitement, faster response to solve the immediate problem.　　From the speech, I learned that when faced with stress, I should suggest to myself--pressure will make me more excited, will let me breathe faster, faster reaction, more agile a

low-configuration machines, you can achieve more computing and higher processing capabilities. Consistency indicator: to achieve consistency between replicas, consistency must be strictly considered whether the business is allowed. Ii. Principles of distributed systems: 1. Hash, which maps different values to different machines or nodes. When considering redundancy, You can map multiple hash values

Basic principles and practice of Linux C programming (2018-06-16-19:12:15)Basic principles and practice of Linux C language programmingEfficient learning with Purpose: what to do and how to use itRe-knowledge of C language C language is a universal, process-oriented programming language, which is widely used i

operator:First, the destructor of the vector is activated; The constructor activates the destructors for these elements (if they have destructors), and then releases the memory used by those elements.Then, release the memory used by the vector.Type blending: untyped pointers and pointer type conversionsWe are very close to the hardware level when using pointers to free-space allocation arrays. Basically, we map the operation of pointers (initialization, assignment, * and []) directly to machine

Martin 12 agile practices are the characteristics of agile practices that distinguish them from heavy processes.1. Our top priority is to satisfy our customers by delivering valuable software as soon as possible and continuously.MIT Sloan Management comment published a paper that analyzes software development practices that help companies build high-quality products. This paper finds many practices that have an important impact on the final system quality. One

12 agile practices are the characteristics of agile practices that distinguish them from heavy processes.1. Our top priority is to satisfy our customers by delivering valuable software as soon as possible and continuously.MIT Sloan Management comment published a paper that analyzes software development practices that help companies build high-quality products. This paper finds many practices that have an important impact on the final system quality. One prac