介绍有60年历史的COBOL编程语言，该语言至今仍被用于政府和银行的大型系统中，并包含计算所得税的示例程序。
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这篇文章详细介绍了COBOL这种有60年历史的编程语言，解释了为什么这种古老的语言突然又变得需求旺盛。文章通过编写一个计算所得税的程序作为简单示例，展示了COBOL在现代系统中的持续应用价值，特别是在政府和银行等机构的大型系统中。
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