#include <iostream>
#include <Eigen/Dense>

int main()
{
   Eigen::Matrix3f A;
   Eigen::Vector3f b;
   A << 1,2,3,  4,5,6,  7,8,10;
   b << 3, 3, 4;
   std::cout << "Here is the matrix A:\n" << A << std::endl;
   std::cout << "Here is the vector b:\n" << b << std::endl;
   Eigen::Vector3f x = A.colPivHouseholderQr().solve(b);
   std::cout << "The solution is:\n" << x << std::endl;
}