generalization and the extended use cases in extension can be used as the backup selection stream of basic Use Case events.
Activity diagram:
The UML activity diagram records the logic of a single operation or method, a single user case, or a single business flow. In many ways,Activity diagramIt is the object-oriented equivalent of a flowchart and a data flowch
For complex practical problems, there are usually dozens or even dozens or hundreds of processes on the data flow diagram. Such a data flow diagram looks unclear. The hierarchical data flow diagram can solve this problem well.
S
Detailed explanation of soft exam afternoon questions --- data flow diagram design, soft exam Data Flow
Five main questions in the afternoon of the soft exam over the years are data flow diagram design, database design, uml diagram
Database Design-Data Flow Diagram (DFD) and data flow dfd1. Data Flow Diagram definition data flow diagram (DFD) is a tool used in structural analysis. It graphically depicts the proces
The basis of software requirement analysis: the model analysis method.
The structured analysis method is applicable to the demand analysis of data processing software. It provides the following modeling tools: data flow diagram, data dictionary, machine learning English language, decision table, and decision tree.
The usage and method of DFD diagram are describ
"Turn": http://blog.csdn.net/xianshengsun/article/details/7439537
"Reference": http://blog.csdn.net/cjr15233661143/article/details/8117555
The drawing of the flow chart
The data flow diagram is also called the flowchart Date flow diagram, DFD, is a convenient user to under
Concept ---- Data Flow Diagram (DFD)
Data Flow Diagram(Date flow divisor, DFD) is a tool used in the SA method to represent the system logic model. It graphically depicts the process of data flow and processing in the system, beca
In the process of writing a document, drawing is indispensable. A graph contains many things and has the intuition that cannot be replaced by a language. The following is a summary of the various images O (worker _ worker) O ~ in the soft work documents under the worker ~. I. Settings: 1. The data flow chart (DFD, dataflowdi.pdf) is a relatively familiar figure.
In the process of writing a document, drawing is indispensable. A graph contains many thin
J2SE Knowledge Points Induction Note (vii)---Java IO Part 2: Get keyboard input and IO Flow system diagram--Reprint Please specify Source: Coder-pigIntroduction to this section:Well, in the previous section we have introduced the use of file and Randomaccessfile classes, and this section we will talk about someCommonly used things, if you learn C + + or C's friends know, get keyboard input is very simple, s
Data Flow Diagram (DFD) is one of the most common structural analysis tools, graphically depicts the data movement in the system.
The data flow diagram has four basic components, as shown in Figure 1.3.
Figure 1.3 Basic components and symbols of a data flow chart
Data
In the test, the data flow chart is a big test site. Both small questions and big questions appear. How can we draw a data flow chart? Here, I sorted it out.
A Data Flow Chart consists of four basic symbols: data flow, processing (or processing), files, data source points, or endpoints. Frankly speaking, these four sym
The importance of a streaming diagram (Dfd-data Flow Diagram) makes it important for system analysts to figure out what to do. So how do we draw a streaming chart? What is the difference between a streaming diagram and a system flowchart? Steps
1 What is included in the streaming d
POJ 1149 PIGS network flow diagram + three AC methods, poj1149
Link: POJ 1149 PIGS
PIGS
Time Limit:1000 MS
Memory Limit:10000 K
Total Submissions:16533
Accepted:7403
DescriptionMirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the key
Drawing the system DFD diagram is a very important part in the requirement analysis of building the system. Today, we will give a brief overview of the data flow graph section.
Composition:
A data flow chart is represented by four types of symbols. They are:Processing,Data Stream,Data storage files,Data SourceOrSettlement point.
Data
POJ 3189 Steady Cow Assignment (largest stream in the network flow + binary diagram)
Address: POJ 3189
I'm dizzy... What is the use of quickly completing Daytime tasks... The saved time was wasted by my hands... After another whole day of adjustment, the problem was actually the inverse of n and m in one place !!! Reflection .. Reflection... Face to face...
This is the binary interval, and then the enumerat
of one case. the first line contains a single positive integer N (1 Characters. no two devices will have exactly the same name. the plug type is separated from the device name by a space. the next line contains a single positive integer k (1 OutputA line containing a single non-negative integer indicating the smallest number of devices that cannot be plugged in.Sample Input4 A B C D 5 laptop B phone C pager B clock B comb X 3 B X X A X D Sample output1SourceEast central North America 1999
N long ago, the Visio diagram was drawn in order to demonstrate architectural design to the leader. If you want to go, only the figure can be better performance. And his own writing is not good. Download address: http://download.csdn.net/detail/gzy11/9735880 csdn download not reliable, do not integrate the people now more points to so many, who is nothing old to the whole point ah. To the source can directly leave a message, leave the mailbox.
Many do
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