NB-076
34 lines
1.0 KiB
Markdown
34 lines
1.0 KiB
Markdown
# 30-keybreak-other — Key Break Non-Summary Change Detector
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## 电信业务场景
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通话状态变化检测。对已排序的通话状态记录进行key切变化检测，当通话状态(待接听/通话中/已结束)发生变化时输出标记行。
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Detects key changes without aggregation:
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- Compare WS-PREV-KEY to detect key changes in sorted input
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- On key change: write "*** KEY CHANGE TO: <KEY> ***" marker line
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- No aggregation — every data record is written to output unchanged
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- First record always starts with a marker line
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## Files
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| File | Purpose |
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|------|---------|
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| `main-30-keybreak-other.cbl` | COBOL program (fixed format) |
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| `data-gen.sh` | Generate sorted test data (4 groups) |
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| `run.sh` | Compile, run, display output |
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## Input Record
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| Field | Type | Length |
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|-------|------|--------|
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| KEY | PIC X | 10 |
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| DATA | PIC X | 30 |
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## Output
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Data records written as-is, with marker lines inserted before
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each new key group. Single-record groups produce a marker
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followed immediately by the data record.
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