COBOL 语言 CLOSE语句文件关闭规范

COBOL阿木 发布于 2025-06-14 6 次阅读

阿木博主一句话概括：深入解析COBOL语言中CLOSE语句的文件关闭规范

阿木博主为你简单介绍：
COBOL（Common Business-Oriented Language）是一种历史悠久的高级程序设计语言，广泛应用于商业、金融和行政等领域。在COBOL编程中，文件操作是不可或缺的一部分。本文将围绕COBOL语言中的CLOSE语句，详细解析其文件关闭规范，包括CLOSE语句的语法、使用场景、注意事项以及最佳实践。

一、

在COBOL编程中，文件操作是数据处理的基础。文件关闭是文件操作流程中的重要环节，它确保了文件资源的正确释放，避免了潜在的资源泄漏问题。本文将深入探讨COBOL语言中CLOSE语句的文件关闭规范，帮助开发者更好地理解和应用这一语句。

二、CLOSE语句的语法

CLOSE语句的语法如下：

```
CLOSE [EXTEND] [NO-EXTEND] [NO-LOCK] [NO-UPDATE] [NO-DELETE] [NO-REWRITE] [NO-ADD] [NO-CHANGE] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] [NO-PRINT] [NO-EDIT] [NO-VERIFY] [NO-REPLACE] [NO-INSERT] [NO-DELETE] [NO-UPDATE] [NO-LOCK] [NO-EXTEND] [NO-READ] [NO-WRITE] 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