cobol-java-v3/benchmark-programs/28-sysin/README.md

28-sysin — SYSIN Reading Simulation

电信业务场景

批量参数SYSIN读取。从SYSIN文件读取月次批处理参数(账期、报表类型、输出格式等)，控制批处理行为。

Purpose

Demonstrates reading parameter cards from a SYSIN file (LINE SEQUENTIAL) in PARAM=VALUE format and using them to control program behavior.

Test Coverage

1. Normal parameters — Read SORT-KEY, OUTPUT-FMT, MAX-RECORDS, etc.
2. Multi-card reading — Process multiple parameter cards sequentially
3. Comments — Lines starting with * or # are skipped
4. Empty SYSIN — File with no content uses defaults
5. Format errors — Missing '=', malformed cards are detected and counted
6. Default values — Parameters not specified retain their defaults

Key Techniques

• LINE SEQUENTIAL file ORGANIZATION for SYSIN
• FUNCTION TRIM for whitespace handling
• FUNCTION UPPER-CASE for case-insensitive matching
• EVALUATE for parameter dispatch
• FILE STATUS checking (10 = end of file)