C++中计算矩阵的行列式

#include <iostream>
#include <Eigen/Dense>
using namespace std;
using namespace Eigen;
int main()
{
    Matrix2d c;
     c << 1, 2,
     3, 4;
    //转置、伴随
    std::cout<<c<<std::endl<<std::endl;
    std::cout<<"转置\n"<<c.transpose()<<std::endl<<std::endl;
    std::cout<<"伴随\n"<<c.adjoint()<<std::endl<<std::endl;
    //逆矩阵、行列式
    std::cout << "行列式： " << c.determinant() << std::endl;
    std::cout << "逆矩阵\n" << c.inverse() << std::endl;
}