{"product_id":"legacy-languages-model-cobol-programs-with-logic-examples-9798694086097","title":"Legacy Languages: Model COBOL programs with logic examples.","description":"\u003cp\u003e • Author(s): Gabriel F. Gargiulo\u003cbr\u003e • Publisher: Independently Published\u003cbr\u003e • Publisher Imprint: Independently Published\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eCOBOL may be a legacy language, but it's not dead. There are huge numbers of programs written in COBOL that are still running, and running well.\u003cbr\u003eThere is no need to rewrite them in another language, since they are working! This book contains generic programs that illustrate major types of logic used in many business programs.\u003cbr\u003eIt's not a book about COBOL syntax. It's the sequence of instructions that accomplish the task at hand.\u003cbr\u003eThe programs are structured in a top-down kind of logic. The flow of control begins at the beginning, and continues in one direction only, down, using subroutine calls (\"PERFORM\", or \"CALL\") to execute procedures, and then return to the major path of program execution flow.\u003cbr\u003eThere is such a thing as a \"Spaghetti\" program, in which the flow of control goes up, down, outside of the current procedure, and anywhere you can imagine. I remember those programs. They were very hard to follow and harder still to maintain. There is no logical method to analyze those programs and to understand them.\u003cbr\u003eThis book contains logic structures that are simple and easy to understand. I used these logic structures during much of the time when I was programming.\u003cbr\u003eThey were tested during October 2020 on an IBM mainframe computer running z\/OS and Enterprise COBOL.\u003cbr\u003eHere are the programs: \u003cbr\u003e1. SEQSIMP1. The Simple, Single File Program\u003cbr\u003e2. SEQRPT1. The Simple, Single File Report Program\u003cbr\u003e3. SEQRPT2. The Simple, Single File Report Program with Record Count or Final Totals\u003cbr\u003e4. SEQCK1. The Sequence Check Program\u003cbr\u003e5. SELECT1. The Record Selection Program\u003cbr\u003e6. VALID1. The Edit or Validate Program\u003cbr\u003e7. BRKLV1. The One Level Subtotal (Control Break) Program\u003cbr\u003e8. BRKLV3. The Three Level Subtotal (Control Break) Program\u003cbr\u003e9. FILEUPD1. The Sequential File, Batch Update Program\u003cbr\u003e10. SORTEX1. The COBOL Sort\u003cbr\u003e11. EVAL1. The CASE Structure: EVALUATE\u003cbr\u003e12. DIRSUB1. Direct Subscripting\u003cbr\u003e13. SERSRCH1. The Sequential Search\u003cbr\u003e14. BINSRCH1. The Binary Search\u003cbr\u003e15. LOADTBL1. Loading a Table from a Sequential File\u003cbr\u003e16. VSAMSEQ1. The VSAM File Read Sequentially\u003cbr\u003e17. VSAMRND1. The VSAM KSDS, Read Randomly\u003cbr\u003e18. VSAMRND2. The VSAM File, Read Randomly Based on Records in a Regular Sequential File\u003cbr\u003e19. VSAMLOD1. VSAM Initial Load\u003cbr\u003e20. VSAMACD1. VSAM File Maintenance (Add, Change, Delete)\u003cbr\u003e21. VSAMSTR1. VSAM Read Sequentially, with START\u003cbr\u003e22. VARWRIT1. Creating a Variable Format File\u003cbr\u003e23. VARREAD1. Reading a Variable Format File\u003cbr\u003e24. VARODOW1. Creating a Variable Format File with Occurs Depending On\u003cbr\u003e25. VARODOR1. Reading a Variable Format File with Occurs Depending On\u003cbr\u003e26. LOADODO1. The Table Load with Occurs Depending On\u003cbr\u003e27. VSAM Error Codes\u003c\/p\u003e","brand":"Independently Published","offers":[{"title":"Paperback","offer_id":45562094747799,"sku":"9798694086097","price":1246.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3471\/1191\/files\/9798694086097.webp?v=1767925879","url":"https:\/\/atlanticbooks.com\/products\/legacy-languages-model-cobol-programs-with-logic-examples-9798694086097","provider":"Atlantic Books","version":"1.0","type":"link"}