NB-076
31 lines
1.3 KiB
Markdown
31 lines
1.3 KiB
Markdown
# 34-sort — SORT Processing Program
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## 电信业务场景
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CDR排序。使用SORT语句对CDR明细进行排序(按主叫号码升序/降序、通话时长多键排序)，支持INPUT/OUTPUT PROCEDURE。
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## Purpose
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Comprehensive demonstration of COBOL SORT statement capabilities, covering SR-N001 through SR-N010.
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## Test Coverage
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| ID | Test | Description |
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|----|------|-------------|
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| SR-N001 | Ascending SORT | USING INPUT-FILE / GIVING OUTPUT-FILE, ASCENDING KEY |
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| SR-N002 | Descending SORT | DESCENDING KEY sort |
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| SR-N003 | Multi-key SORT | ASCENDING KEY + DESCENDING KEY (mixed) |
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| SR-N004 | INPUT PROCEDURE | FILTER-INPUT section, only records with VALUE > 200 |
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| SR-N005 | OUTPUT PROCEDURE | SUMMARIZE-OUTPUT with key break totals |
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| SR-N006 | 0-record SORT | Empty input file |
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| SR-N007 | 1-record SORT | Single record input |
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| SR-N008 | INPUT/OUTPUT PROCEDURE | Both procedures combined with editing |
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| SR-N009 | Duplicate key SORT | Three records with same key (stability check) |
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| SR-N010 | Descending multi-key | DESCENDING + ASCENDING combined |
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## Key Techniques
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- SORT USING/GIVING
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- INPUT PROCEDURE / OUTPUT PROCEDURE
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- ASCENDING KEY / DESCENDING KEY
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- RELEASE statement (input procedure)
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- RETURN statement (output procedure)
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- Key break processing in output procedure
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