title: LP Simplex algorithm in C++
body: <p>I need the robust C++ source code of the simplex algorithm (is a popular algorithm for numerical solution of the linear programming problem). </p>
  
  <p>Please, no links to wikipedia. I need good source code in C++, using templates, clear user-friendly names and work very well. </p>
  
  <p>Preferably algorithm must check the unstable floating-point calculation.</p>