iskm/learnxinyminutes-docs
1
0
Fork 0
mirror of https://github.com/adambard/learnxinyminutes-docs.git synced 2024-12-23 09:41:36 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Adjusting formatting

Browse Source 
carriage returns and some spelling
This commit is contained in:
Andrew Ryan Davis 2020-08-09 14:44:38 -07:00 committed by GitHub
parent 2d387a2aae
commit 36d86cd4d4
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
cobol.html.markdown
View File

@ -15,7 +15,7 @@ organizations.
*and modern (COBOL-2002 and COBOL-2014) versions.
*Legacy versions require columns 1-6 to be blank (they are used
*to store the index number of the punched card..)
*A * in column 7 means a comment.
*A '*' in column 7 means a comment.
*In legacy COBOL, a comment can only be a full line.
*Modern COBOL doesn't require fixed columns and uses *> for
*a comment, which can appear in the middle of a line.
@ -44,8 +44,9 @@ organizations.
*Let's declare some variables.
*We do this in the WORKING-STORAGE section within the DATA DIVISION.
*Each data item (aka variable) with start with a level number, then the name of the item,
*followed by a picture clause describing the type of data that the variable will contain.
*Each data item (aka variable) with start with a level number,
*then the name of the item, followed by a picture clause
*describing the type of data that the variable will contain.
*Almost every COBOL programmer will abbreviate PICTURE as PIC.
*A is for alphabetic, X is for alphanumeric, and 9 is for numeric.
@ -93,8 +94,10 @@ organizations.
*********PERFORM********************
*The PERFORM keyword allows you to jump to another specified section of the code, and then to return to the next executable
*statement once the specified section of code is completed. You must write the full word, PERFORM, you cannot abbreviate it.
*The PERFORM keyword allows you to jump to another specified section of the code,
*and then to return to the next executable
*statement once the specified section of code is completed.
*You must write the full word, PERFORM, you cannot abbreviate it.
IDENTIFICATION DIVISION.
PROGRAM-ID. HELLOCOBOL.
@ -102,8 +105,9 @@ organizations.
PROCEDURE DIVISION.
FIRST-PARA.
DISPLAY 'THIS IS IN FIRST-PARA'.
PERFORM THIRD-PARA THRU FOURTH-PARA. *>skip over second-para and perfrom third and fourth
*> then after performing third and fourth, return here and continue the program until STOP RUN.
PERFORM THIRD-PARA THRU FOURTH-PARA. *>skip over second-para and perfrom 3rd & 4th
*> then after performing third and fourth,
*> return here and continue the program until STOP RUN.
SECOND-PARA.
DISPLAY 'THIS IS IN SECOND-PARA'.
@ -127,7 +131,10 @@ organizations.
*Now it is time to learn about two related COBOL verbs: string and unstring.
*The string verb is used to concatenate, or put together, two or more stings. Unstring is used, not surprisingly, to separate a *string into two or more smaller strings. It is important that you remember to use ‘delimited by’ when you
*The string verb is used to concatenate, or put together, two or more stings.
*Unstring is used, not surprisingly, to separate a
*string into two or more smaller strings.
*It is important that you remember to use ‘delimited by’ when you
*are using string or unstring in your program.
IDENTIFICATION DIVISION.
@ -149,19 +156,23 @@ organizations.
*The above code will output:
THE FULL NAME IS: BOB COBB
*Let’s examine it to see why.
*First, we declared all of our variables, including the one that we are creating by the string command, in the DATA DIVISISION.
*First, we declared all of our variables, including the one that we are creating
*by the string command, in the DATA DIVISION.
*The action takes place down in the PROCEDURE DIVISION. We start with the STRING keyword and end with END-STRING. In between we *list what we want to combine together into the larger, master variable.
*The action takes place down in the PROCEDURE DIVISION.
*We start with the STRING keyword and end with END-STRING. In between we
*list what we want to combine together into the larger, master variable.
*Here, we are combining FIRST-NAME, a space, and LAST-NAME.
*The DELIMITED BY phrase that follows FIRST-NAME and LAST-NAME tells the program how much of each variable we want to capture.
*DELIMITED BY SPACE tells the program to start at the beginning, and capture the variable until it runs into a space.
*The DELIMITED BY phrase that follows FIRST-NAME and
*LAST-NAME tells the program how much of each variable we want to capture.
*DELIMITED BY SPACE tells the program to start at the beginning,
*and capture the variable until it runs into a space.
*DELIMITED BY SIZE tells the program to capture the full size of the variable.
*Since we have DELIMITED BY SPACE after FIRST-NAME, the GIBBERISH part is ignored.