concatenate

代码说明：

说明：  文件组合合并. 该程序用于将两个文件（可以是txt或xls文件）进行组合合并，例如假设A.txt文件中含有‘00’和‘01’两行，B.txt文件中含有‘aa’和‘ bb’两行,则合并后的文件AB.txt文件中含有‘00aa’、‘ 00bb’、‘01aa’和‘ 01bb’四行。(Combination of the merger document. The program for the two files (can be a txt or xls file) in the combined portfolio, such as the assumption A.txt document 00 and 01 contains two lines, B.txt documents containing aa and bb two lines, then after the merger documents AB.txt document containing 00aa, 00bb, 01aa and 01bb quatrain.)