COBOL语言的简单报表程序。打印季度的销售情况并计算总金额。-A simple COBOL language report program. Sales of printing quarter and calculate the total amount.

用于水文时间序列 年序列提取季度系列以便计算季度变化趋势等特性-Hydrologic time series for extracting quarterly series in sequence in order to calculate trends and other characteristics quarter