关键词: 程序设计, 功能扩展, 输入/输出, 集成数据, 字符处理

Abstract: In UNIX, B-shell is the most important shell, but it has some shortcomings compared with general programming language. For example, it has no integrated data type similar to arrays and weak ability to calculate and no formatted input-output ways, which is not easy to dispose numerical or char data type. It is also weak in dealing with character string. In this paper the B-shell functions of array data type, dealing with character string, calculating ability, and formatted input-output ways were expanded by using B-shell’s own functions and relative technology. The expansion will make B-shell have the functions similar to those of other high-level programming languages.

Key words:  program design, function expansion, input/output, integrated data, character disposal