1#include <iostream> 2#include <Eigen/Dense> 3 4using namespace std; 5using namespace Eigen; 6 7int main() 8{ 9 Matrix3f A; 10 A << 1, 2, 1, 11 2, 1, 0, 12 -1, 1, 2; 13 cout << "Here is the matrix A:\n" << A << endl; 14 cout << "The determinant of A is " << A.determinant() << endl; 15 cout << "The inverse of A is:\n" << A.inverse() << endl; 16}