I am trying to solve a linear equation Ax=b in C++ program by calling Octave function mldivide. I know in Octave software command window, I just need to type x=mldivide(A,b). Then I read your instruction on Octave website (http://octave.sourceforge.net/doxygen/html/d4/d05/data_8cc.html#acf094020d4951303dfc5df0055f0ef36) about how to use Fmldivide function. Here is the declaration of Fmldivide: