Shulou(Shulou.com)06/03 Report--

This article mainly introduces the example analysis of the program design flow chart, which has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

The program flow chart, also known as the program block diagram, is a graphical representation of the specific steps of running the program with a unified standard symbol. The design of the program block diagram is to identify the main running steps and contents of the computer through the detailed analysis of the input and output data and the processing process on the basis of the processing flow chart. Program block diagram is the most basic basis for program design, so its quality is directly related to the quality of program design.

A brief introduction to the flow chart of programming

A program flow chart is a diagram that uses specified symbols to describe the operations or judgments required in a special program. This flow chart focuses on the logic and processing sequence of the program, and specifically describes the logic and steps of solving problems on a microcomputer. When there are more loop statements and transfer statements in the program, the structure of the program will be more complex, which makes it difficult for program design and reading. The program flow chart draws the program flow direction in the form of a graph, which is a graphical representation of the algorithm, which is intuitive, clear and easier to understand.

The program flow chart is composed of processing box, judgment box, start and stop box, connection point, flow line, comment box, etc., and combined with the corresponding algorithm to form the whole program flow chart.

The processing box has the processing function; the judgment box (diamond box) has the function of judging conditions, with one entrance and two exits; the start and stop box indicates the beginning or end of the program; the connection point can connect the process line; the flow line (indicates the path and direction of the process; the annotation box is used to make necessary supplementary instructions to the operation of some boxes in the flow chart.

The basic structure of programming flow chart

Any complex algorithm can be composed of three basic structures: sequential structure, selective (branching) structure and cyclic structure. therefore, when constructing an algorithm, only these three basic structures are used as "building units". Abide by the norms of the three basic structures, the basic structures can be juxtaposed and included with each other, but not allowed to cross. It is not allowed to transfer directly from one structure to the interior of another. It is precisely because the whole algorithm is composed of three basic structures, just like building with modules, so the structure is clear, easy to verify correctness, easy to correct errors, this method is the structured method. The programming that follows this method is structured programming. Accordingly, as long as the flow chart of the three basic structures is defined, the flow chart of any algorithm can be drawn.

(1) sequence structure

The sequential structure is a simple linear structure, and the boxes are executed sequentially. The basic shape of the flowchart is shown in the figure, and the execution order of the statements is:

A → B → C .

(2) Select (branch) structure

Thank you for reading this article carefully. I hope the article "sample Analysis of programming flow Chart" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.