在double struct C ++中返回值

Question

I want to return the degree from my Term struct.From my understanding I need to access the Node->Term->Degree however my function doesn't take a Node as a argument so how would I approach this?

//This function returns the degree for example
//a.degree returns degree
int Polynomial::degree() const{

}

struct Term{
   int coeff;
   int degree;
};
struct Node {
   Term *term;
   Node *next;
};

These are my structs.

Polynomial.cpp is as followed (shortened) :

using namespace std;
struct Term{
   int coeff;
   int degree;
};

struct Node {
   Term *term;
   Node *next;
};

int Polynomial::degree() const{

}

Polynomial.h is as followed (shortened) :

using namespace std;
Class Polynomial {
struct Term{
   int coeff;
   int degree;
};

struct Node {
   Term *term;
   Node *next;
};

public:
int degree() const;

private:
Node * poly;

Answer 1

Basically you do the following:

int Polynomial::degree() const{
    // Here add your code to check if the pointers are null and
    // implement your early return or exception handling strategy.
    // Below is how to get the degree value using Node type data member
    return poly->term->degree;
}

This is ONLY how to get the degree using poly. Please do not forget the nullity check before trying to access the value.