NB-076
24 lines
1021 B
Markdown
24 lines
1021 B
Markdown
# 28-sysin — SYSIN Reading Simulation
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## 电信业务场景
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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。
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## Purpose
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Demonstrates reading parameter cards from a SYSIN file (LINE SEQUENTIAL) in PARAM=VALUE format and using them to control program behavior.
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## Test Coverage
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1. **Normal parameters** — Read SORT-KEY, OUTPUT-FMT, MAX-RECORDS, etc.
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2. **Multi-card reading** — Process multiple parameter cards sequentially
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3. **Comments** — Lines starting with * or # are skipped
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4. **Empty SYSIN** — File with no content uses defaults
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5. **Format errors** — Missing '=', malformed cards are detected and counted
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6. **Default values** — Parameters not specified retain their defaults
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## Key Techniques
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- LINE SEQUENTIAL file ORGANIZATION for SYSIN
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- FUNCTION TRIM for whitespace handling
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- FUNCTION UPPER-CASE for case-insensitive matching
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- EVALUATE for parameter dispatch
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- FILE STATUS checking (10 = end of file)
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