Error:指向綁定函數的指針只能用於調用函數

 a1.determinant;

改為： a1.determinant();

 

    Eigen::MatrixXd a1(2,2);//ImagePoint
    a1<<n1,p1,n2,p2;
    double A1=a1.determinant;

改為：

    Eigen::MatrixXd a1(2,2);//ImagePoint
    a1<<n1,p1,n2,p2;
    double A1=a1.determinant();