线性方程一元求解double roundto(double x,int n) //将某数保留指定位数！-linear equations to solve one yuan roundto double (double x, int n) / / designated certain reservations median!

To solve the linear programming problem, that is, in a set of linear inequalities, or a set of equations of constraint conditions

数值方法里面的用lagrange插值发求解线形方程的算法,可以用来解线形方程组的习题(The inside of the numerical methods used though laser hair interpolation algorithm for solving linear equations, problem sets can be used to solve the linear system of equations)