矩阵计算的c++代码，本矩阵类实现了对矩阵的一些基本操作，比如 +, -, *，求逆等。

实现了矩阵的列主元LU分解，并利用它实现了线性代数方程组的直接解法；还有线性方程组的迭代解法。

另外定义了一些非数学上但经常用到的一些操作

比如两个矩阵对应元素的相乘、相除，对矩阵的每个元素求abs,sqrt等-matrix calculation of c code, the matrices of the matrix to achieve some basic tasks, such as, -, *, such as inverse. Achieving the Matrix series PCA LU decomposition, and use it to achieve a linear algebraic equations direct method; There linear equations of the iterative solution. Another definition of a non-mathematical but frequently used for the operation of two elements in the matrix multiplication, eliminate, the right of each matrix element for abs, sqrt, etc.