Question

我创建了几个带有相关标头和声明/定义函数的源文件。我一直收到错误，说班级没有会员。我正在调用一个明确将成员与我的私人成员相关联的集合函数。还有其他我应该包括的内容吗？

#ifndef STUDENTCOLLECTION_H
#define STUDENTCOLLECTION_H

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

using namespace std;

#include "StudentProfile.h"
#include "Person.h"
#include "Student.h"
#include "Course.h"

class StudentCollection
{
 private:
  vector<StudentProfile> StCollection;

 public:
  void GetInfo();
  void PrintCollection();
  StudentCollection(){};
  StudentCollection(vector<StudentProfile> StCollection){};
};

#endif

这是.cpp文件：

#ifndef STUDENTCOLLECTION_CPP
#define STUDENTCOLLECTION_CPP

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

#include "StudentCollection.h"
#include "StudentProfile.h"
#include "Student.h"
#include "Person.h"
#include "Course.h"

void StudentCollection::GetInfo()
{
  long SN;
  string first;
  string last;
  string a;
  char sex;
  long ID;
  Course Class1;
  Course Class2;
  Course Class3;
  long num;
  string name;
  Person PInfo;
  Student SInfo;

  ifstream fin;
  fin.open("info.txt");

  fin >> first >> last >> SN >> a >> sex >> ID >> SInfo.Class1.num >> SInfo.Class1.name >> SInfo.Class2.num >> SInfo.Class2.name >> SInfo.Class3.num >> SInfo.Class3.\
name;

while (!fin.eof())
  {
    StudentProfile New_Stu;
    New_Stu.SetAStudentProfile(PInfo, SInfo);
    New_Stu.PInfo.SetSetAPerson(SN, first, last, a, sex);
    New_Stu.SInfo.SetAStudent(ID, Class1, Class2, Class3);
    New_Stu.SInfo.SetACourse(num, name);

    StCollection.push_back(New_Stu);
    fin >> first >> last >> SN >> a >> sex >> ID >> SInfo.Class1.num >> SInfo.Class1.name >> SInfo.Class2.num >> SInfo.Class2.name >> SInfo.Class3.num >> SInfo.Class3.\
name;
  }
 fin.close();
}

void StudentCollection::PrintCollection()
{
}

#endif

StudentProfile.h文件：

#ifndef STUDENTPROFILE_H
#define STUDENTPROFILE_H

using namespace std;
#include "Person.h"
#include "Student.h"

class StudentProfile
{
 private:
  Person PersonalInfo;
  Student StdInfo;

 public:

  void SetAStudentProfile(Person PInfo, Student SInfo);
  void PrintAStudentProfile();
  StudentProfile(){};
  StudentProfile(Person PInfo, Student SInfo){};
};

#endif

StudentProfile.cpp：

#ifndef STUDENTPROFILE_CPP
#define STUDENTPROFILE_CPP

#include<iostream>
using namespace std;

#include "StudentProfile.h"

void StudentProfile::SetAStudentProfile(Person PInfo, Student SInfo)
{
  PersonalInfo = PInfo;
  StdInfo = SInfo;
}

void StudentProfile::PrintAStudentProfile()
{
}

#endif

这是我编辑的错误（我在其他地方有另一个问题，但我确定原因是一样的）：

StudentCollection.cpp:43: error: ‘class StudentProfile’ has no member named ‘PInfo’
StudentCollection.cpp:44: error: ‘class StudentProfile’ has no member named ‘SInfo’
StudentCollection.cpp:45: error: ‘class StudentProfile’ has no member named ‘SInfo’

Answer 1

这些行：

StudentProfile New_Stu;
New_Stu.SetAStudentProfile(PInfo, SInfo);
New_Stu.PInfo.SetSetAPerson(SN, first, last, a, sex);
New_Stu.SInfo.SetAStudent(ID, Class1, Class2, Class3);
New_Stu.SInfo.SetACourse(num, name);

应该是：

StudentProfile New_Stu;
New_Stu.SetAStudentProfile(PInfo, SInfo);
New_Stu.PersonalInfo.SetSetAPerson(SN, first, last, a, sex);
New_Stu.StdInfo.SetAStudent(ID, Class1, Class2, Class3);
New_Stu.StdInfo.SetACourse(num, name);

但您可能还需要将这些成员的访问修饰符更改为public，因为这是StudentCollection类中的代码。或者，您可以在StudentProfile内创建一些其他设置者，这样您就无需尝试从外部访问PersonalInfo和StdInfo成员。

Answer 2

你有以下几行：

New_Stu.PInfo.SetSetAPerson(SN, first, last, a, sex);
New_Stu.SInfo.SetAStudent(ID, Class1, Class2, Class3);
New_Stu.SInfo.SetACourse(num, name);

哪次尝试访问New_Stu.PInfo和New_Stu.SInfo，这些都未被定义为StudentProfile类的一部分。您将PInfo和SInfo定义为GetInfo()方法的局部变量 - 您打算使用这些吗？

Answer 3

确实在你的StudenProfile课程中没有PInfo和SInfo成员。如果查看StudentCollection.cpp，则声明单独的局部变量PInfo和SInfo

Person PInfo;
Student SInfo;
...

稍后在你错误使用的while循环中：

New_Stu.PInfo.SetSetAPerson(SN, first, last, a, sex);
New_Stu.SInfo.SetAStudent(ID, Class1, Class2, Class3);
New_Stu.SInfo.SetACourse(num, name);

我猜您还有Person和Student的课程。可能Student有以下成员SetAStudent和SetACourse，而成员Person有SetSetAPerson。在这种情况下，您可以简单地调用（不使用New_Stu）：

PInfo.SetSetAPerson(SN, first, last, a, sex);
SInfo.SetAStudent(ID, Class1, Class2, Class3);
SInfo.SetACourse(num, name);

班级''没有名为''的成员

3 个答案: