封装了基本的文件输入输出操作，可以读取文件中的矩阵，无论文件中以什么格式输入，它都可以做到，辛勤劳作所得，值得分享。-Packaging the basic input and output file operations can read the document matrix, no matter what format the document input, it can be done, hard work proceeds, it is worth sharing.