c++访问单链表中的特定值

Question

我的列表包含一个名称和一个校园 ID (CWID)。我如何将列表中的 cwid 与我传入的整数进行比较？我在下面写了我正在尝试做的比较的伪代码。

void check_cwid(studentList& list, int cwid) {

studentNode *p = list.head_;

while(p != nullptr){

 //Something like this 
   if *p.cwid() == cwid
  //do something

  p = p->next_;

}

我正在尝试完成上面代码中的内容。我只是不知道如何比较列表中的特定项目。下面是我的整个练习项目。

#include <iostream>
using namespace std;

class student {

public:

    student(const string& sname = "", int cwid = 0) : sname_(sname), cwid_(cwid) {}

    string sname() const {return sname_;}
    int cwid() const {return cwid_;}

    friend ostream& operator <<(ostream& os, student st){
        return os << endl << st.sname_ << endl << st.cwid_ << endl;
    }



private:

    string sname_;
    int cwid_;

};


struct studentNode {

    studentNode(const string& sname, int cwid, studentNode* next=nullptr) :st_(sname, cwid), next_(next) {}

    studentNode(student& st, studentNode* next=nullptr) : st_(st), next_(next) {}

    friend ostream& operator << (ostream& os, studentNode node) {
        return os << node.st_;
    }


    studentNode* next_;
    student st_;

};

struct studentList {

    studentList() : head_(nullptr), size_(0) {}

    studentNode* head_;
    size_t size_;

};


///******************** what im trying to do
void check_cwid(studentList& list, int cwid) {

    studentNode *p = list.head_;

    while(p != nullptr){




    }
}

Answer 1

int check_cwid(studentList& list, int cwid) {

studentNode *p = list.head_;
int list_size = list.size_;
while(list_size--){

 //Something like this 
   if (p -> st_.cwid() == cwid)
  //do something
   break;
   else
       p = p -> next_;

}