c ++指针引用方法调用

Question

I'm making a program to manage binary trees, but I have a problem here:

void Arbol :: insertar(Nodo*& p, float clave)
{
    if(p == NULL){
        p = new Nodo(clave);
    }else if(clave < p->getclave()){
        insertar(p->getsubarbol_izq(), clave);
    }else{
        insertar(p->getsubarbol_der(), clave);
    }
}

Nodo*& is a reference of the pointer in each node (nodo) in the tree (Arbol).

p->getsubarbol_der() returns a pointer to nodo (nodo*).

But I have this error while calling insertar method of Arbol class: error: no matching function for call to 'Arbol::insertar(Nodo*, float&)'|

Answer 1

我认为基本问题是p->getsubarbol_der()返回一个临时p->getsubarbol_der() ，而您试图通过非const引用将该临时insertar()传递给insertar() 。