類''沒有名爲''的成員'

Question

我已經創建了幾個具有關聯標題和聲明/定義函數的源文件。我不斷收到一個錯誤，指出一個班級沒有成員。我正在調用一個明確地將一個成員關聯到我的私人成員的集合函數。還有什麼我應該包括在內？

#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 

它的.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 

的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 

這是我的編輯錯誤（我在另一個地方有另一個問題，但我是肯定的原因是一樣的）：

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

你有這些行：

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

哪個試圖訪問New_Stu.PInfo和New_Stu.SInfo，這兩個國家都定義爲StudentProfile類的一部分。您有PInfo和SInfo定義爲局部變量的GetInfo()方法 - 您是否打算使用這些？

Answer 2

這些行：

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); 

應該是：

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); 

，但您可能還需要對這些成員的訪問修飾符更改爲public因爲這是StudentCollection類中的代碼。或者，您可以在StudentProfile之內創建一些額外的安裝人員，以便您不需要嘗試從外部訪問PersonalInfo和StdInfo成員。

Answer 3

確實在您的StudenProfile類中沒有PInfo和SInfo成員。如果你看一下StudentCollection.cpp聲明不同的局部變量PINFO和SInfo

Person PInfo; 
Student SInfo; 
... 

後來while循環中你錯誤地使用：

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

我想你也有類Person和Student。可能Student有以下成員SetAStudent和SetACourse和類Person有SetSetAPerson。在這種情況下，你可以簡單地調用（不New_Stu）：

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