问没有与'TiXmlElement::TiXmlElement(std::_cxx11::string&)调用匹配的函数

EN

    for (int i = g, x=0; i < counter - 1 && x < 99; i++,x++){
std::string point = std::to_string(i);
std::string pointx = std::to_string(point_vec[i].x);
std::string pointy= std::to_string(point_vec[i].y);

TiXmlElement* P = new TiXmlElement( point );
TiXmlText* X = new TiXmlText(pointx);
doc.LinkEndChild(X);
TiXmlText* Y = new TiXmlText(pointy);
doc.LinkEndChild(Y);
doc.LinkEndChild(P);
}