解线性方程组的控制台程序，程序里有一个向量类，一个矩阵类和一个方程类；可以用键盘输入数据，也可从文本文件中读入数据，输出结果到屏幕和文本文件。-Linear Equations of the console program, the program there is a vector class, a matrix equation of class and a class can use the keyboard input data can also be read from a text