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我在编译与其他成功编译的函数类似的函数时遇到问题。这是错误：

University.cpp: In function ‘bool ValidCRN(long int)’:
University.cpp:113: error: ‘Courses’ was not declared in this scope
University.cpp:23: error: ‘int University::index’ is protected
University.cpp:117: error: within this context
University.cpp:22: error: ‘bool University::success’ is protected
University.cpp:118: error: within this context
University.cpp:21: error: ‘bool University::failure’ is protected
University.cpp:122: error: within this context

这是我的大学.h：

#ifndef UNIVERSITY_H
#define UNIVERSITY_H

#include <string>
#include <vector>
#include <iostream>

using namespace std;

#include "Department.h"
#include "Student.h"
#include "Course.h"
#include "Faculty.h"
#include "Person.h"

class University
{
  friend ostream& operator<< (ostream& os, const vector<Department>& d);
  friend ostream& operator<< (ostream& os, const Department& department);
  friend ostream& operator<<(ostream& os, const vector<Faculty>& f);
  friend ostream& operator<<(ostream& os, const Faculty& faculty);
  friend ostream& operator<<(ostream& os, const vector<Student>& s);
  friend ostream& operator<<(ostream& os, const Student& student);
  friend ostream& operator<<(ostream& os, const Course& course);
  friend ostream& operator<<(ostream& os, const vector<Course>& c);

 protected:
  vector<Department> Departments;
  vector<Student> Students;
  vector<Course> Courses;
  vector<Faculty> Faculties;
  static bool failure;
  static bool success;
  static int index;

 public:
  bool CreateNewDepartment(string dName, string dLocation, long dChairID);
  bool ValidFaculty(long dChairID);
  bool ValidDepartID(long fDepartID);
  bool CreateNewFaculty(string pName, string pEmail, string pAddress, string pDateOfBirth, string pGender,float fSalary, int fYearOfExp, long fDepartID);
  bool CreateNewStudent(string pName, string pEmail, string pAddress, string pDateOfBirth, string pGender, int sYearOfStudy, string sMajor, long sAdvisorID);
  bool CreateNewCourse(int cMaxAvailableSeats, string cName, long cDepartID, long cAssignedSeats, long cIsTaughtBy);
  bool ValidMajor(string sMajor);
  bool ValidAdvisor(long sAdvisorID);
  bool ValidInstructor(long cIsTaughtBy);
  bool RemoveADepartment(long ID);
  bool ValidDID(long ID);
  bool RemoveAStudent(long ID);
  bool ValidSID(long ID);
  bool RemoveACourse(long CRN);
  bool ValidCRN(long CRN);
  bool RemoveAFaculty(long ID);
  bool ValidFID(long ID);
};
#endif

我的 University.cpp 文件包含四个函数（前两个没有编译错误）：

#include<string>
#include<vector>
#include<iostream>
using namespace std;

#include "University.h"

bool University::failure = false;
bool University::success = true;
int University::index;  //This is line 23

bool University::RemoveADepartment(long ID)
{
  if(ValidDID(ID) == University::success)
    {
      for (int i = 0; i < Departments.size(); i++)
        Departments.erase(Departments.begin() + University::index);
      cout << "Department " << ID << " deleted." << endl;
      cout << Departments;
      return University::success;
    }
  return University::failure;
}

bool University::ValidDID(long ID)
{
  for (int i = 0; i < Departments.size(); i++)
   {
      if(Departments[i].ID == ID)
        {
          University::index = i;
          return University::success;
        }
   }
  cout << "Department not found." << endl;
  return University::failure;
}

bool University::RemoveACourse(long CRN)
{
  if (ValidCRN(CRN) == University::success)
    {
      for (int i = 0; i < Courses.size(); i++)  
        Courses.erase(Courses.begin() + University::index);
      cout << "Course " << CRN << " deleted." << endl;
      return University::success;
    }
  return University::failure;
}

bool ValidCRN(long CRN)
{
  for(int i = 0; i < Courses.size(); i++)  //This is Line 113
    {
      if (Courses[i].CRN == CRN)
        {
          University::index = i; //This is Line 117
          return University::success;
        }
    }
  cout << "Course " << CRN << " not found." <<endl;
  return University::failure;
}

我不完全确定为什么会出现这些错误。我的课程向量不能成为问题。我能够成功地将它填充到一个函数中（未列出）。而且我一直在我的其他函数中使用我的静态变量，没有任何问题。知道为什么我会得到这个吗？

4

1 回答 1

4

ValidCRN被声明为Universityso的成员

bool ValidCRN(long CRN)

在你的 cpp 中需要

bool University::ValidCRN(long CRN)

编译器错误的原因是您的代码声明了一个名为ValidCRN. 此函数不是该类的成员，University但会尝试访问该类的受保护成员。

于 2013-11-10T21:29:37.590 回答