Recently I have been busy with my work and my graduation work, so I am not very busy. Now we have a bit of free time. Let's take a look.
Since so many people need the COBOL teaching materials, I will recommend them to you.It is in the IBM library, and I think it is comprehensive. As long as you finish reading this, it should be okay with Cobol.
IBM Library ReaderHttp://www-1.ibm.com/support/docview.wss?
I have recently started learning Cobol. Of course, I need to understand some background and application fields and prospects for learning a language. Let's talk about my questions and understanding.
1. How old is Cobol?For this question, read a book and check the information. COBOL is the abbreviation of common business oriented language. It is mainly used to s
I really didn't expect that I would do it in COBOL, even if I knew the history of computers:
Post a post that has been transferred n times
1. How old is Cobol?For this question, read a book and check the information. COBOL is the abbreviation of common business oriented language. It is mainly used to solve a large number of data processing problems in business an
Abbreviations:
COBOL(Common Business Oriented Language)
Chinese Translation: Cobol Language
Interpretation: a programming language similar to English that is suitable for business and data processing. This language accurately expresses the business data processing process.
COBOL is one of the oldest advanced programming languages and the first commercial languag
Interest calculation is an important business of banks, including daily proxy customer collection, calculation of customer interest, and annual interest calculation. Currently, most of this work is performed on the Safe Application System Platform of the IBM es9000 host. The online program and the on-line interest rate program are implemented in the IBM 370 assembly language. For ease of reading and writing in assembly language, the data storage format is defined in the data stored in the VSAM f
COBOL language IntroductionCOBOL Introduction--Business computing preferred Language COBOL is the acronym for the Common Business oriented Language (general commercial language). Widely used in the field of data management, such as accounting work, statistical reports, planning, personnel management. is referred to as the "language for Administration".Characteristics of data processing:The arithmetic comput
Next to the book (an entry to the COBOL study notes)SlaveProgramWe can see that the COBOL program is divided into four parts:Identification Division.Environment Division.Data Division.Procedure division.
For more information about the functions of each part, see Chapter 1 Cobol.
Here we mainly look at the content in procedure Division. This is the core.Process
The format of the COBOL source program is as follows:
Each line starts with a sequence number with six characters. You can enter limit 10 or limit 20 to indicate the rows.
The sequence number area is followed by an indicator area of a character (7th characters), as shown in the first line. You can use "*" and "/" to represent comments, "_" to represent continued rows, and "D" to represent debugging.
The indicator area is followed by four characters (8
The first time I got in touch with Cobol today, the lecturer was an English speaker. It was really hard to take the course. Alas .... the English is not good. There are two books in China that feel okay, the simple guide of COBOL and the programming language design of COBOL (TAN haoqiang)
The following is the first program and a hello program. The tool is
First o
The format of the identity department:code example:Identification Division.Program-id. Idsample.AUTHOR. PROGRAMMER NAME.Installation. COBOL Development CENTER.Date-written. 08/27/88.Date-compiled. 09/01/88 12:57:53.SECURITY. Non-confidential.Format of the Ministry of the Environment:code exampleEnvironment Division.CONFIGURATION section.Source-computer. ibm-as400.Object-computer. ibm-as400.Special-names. Cð1 is top-of-page.Source-computer defines the
COBOL syntax and grammar (1)
RedefinesDifferent variables can be used to describe the same memory.01 part_recode usage display03 part-type picture...03 part_type_a.05 part_number picture...05 part_cost picture...03 part_type_ B redefines part_type_a.05 upc_code picture...03 part_type_c redefines part_type_a.05 ISBN picture...Based on part_type, choose part_type_a, part_type_ B, or part_type_c.Rules:The length of part_type_ B and par
Recursion is rarely used in Cobol. It is also boring to see this example in IBM book.
Identification Division.
Program-id. recutestRecursive.
**************************************** ***
* Recursive Test
**************************************** **
Environment Division.
Data Division.
Working-storage section.
01 numb PIC 9 (4) value 5.
01 fact PIC 9 (8) value 0.
Local-storage section.
01 num PIC 9 (4 ).
Procedure division.
M
of the memory
Description of the file General formatFD file name (internal file name)01 Record Name05 data item 1 PIC ...05 Data item 2 PIC ...An FD statement is a file descriptor that describes the properties of a file and a record, such as the record name, format, and length .All data groups and data items under the FD statement make up a record of the file.Record Description: The record description begins with a 01-layer number followed by a record name. The data format used to define r
Today, I downloaded the cartoon. As a result, only vol1 and vol2 were published on verycd, and the rest of them were complete. There is no way to go online. You have to wait for the webpage to load up and watch the advertisement. So I made a cartoon downloader myself.
In the multi-threaded download class, I defined a downloadfinished event and returned all the download information. However, after the main form receives this event, nothing is executed. After the breakpoint is reached, it is fou
PAT 07-3 evaluate prime number, pat07-3 evaluate Prime Number
Evaluate the prime number. This is an "old" problem. Everyone who has learned programming should have encountered it. Here is the classic problem of finding the prime numbers from M + 1 to N, of course, you have to write it down. The following are the question requirements and code implementation.
1/*
Data structure routine -- Expression evaluate (using stack structure), routine evaluate
This article focuses on the basic series of network courses on data structures (3): Application 1-expression evaluation of 5th class stacks in stacks and queues.
For example, you enter a valid mathematical expression that contains "+", "-", "*", "/", positive integers, and parentheses to calculate the operation result o
The python iterator implements the Fibonacci evaluate and the python Fibonacci evaluate
The Fibonacci sequence, also known as the Golden series, is also known as the rabbit Series: F (0) = 0, F (1) = 1, F (n) = F (n-1) + F (n-2) (n ≥ 2, n *). For example, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89,144,233,377,610,987,159, 28657,463 ........ this series starts from 3rd items, and each item is equal to the sum of t
PHP implements the stack-based suffix expression evaluate function, and php suffix expression evaluate
This example describes how to evaluate a stack-based suffix expression in PHP. We will share this with you for your reference. The details are as follows:
Suffix expression Overview
Suffix expression, which does not contain parentheses. Operators are placed behi
Infix expression evaluate, infix evaluate
The infix expression is used to calculate an expression, such as a calculator.
This is implemented using the stack data structure. First, enter a string to represent an expression, and then store the number with one stack and the storage symbol of the other stack.
If the priority of the current operator is higher than that of the top element of the stack, the incomi
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