编译器错误：未在范围内声明

Question

我正在尝试为我创建的几个类测试我的代码，但在尝试编译时遇到了一些困难。我有三个班级和一个主班。第一类是人类，第二和第三类是从人派生的学生和教师。 这是 Person.h 类的内容：

#ifndef Person_H
#define Person_H
#include <string>

using namespace std;

class Person
{
 protected:
  long id;
  string name;
  string email;
  string address;
  string dateOfBirth;
  string gender;

 public:
  Person(long pId);
  Person(long pId, string pName, string pEmail, string pAddress, string pDateOfBirth, string pGender);
  void print() const;
};
#endif

这是我的 Person.C

#include <iostream>
#include "Person.h"
using namespace std;

Person::Person(long pId)
{
  id = pId;
  name = "Nothing";
  email = "Nothing";
  address = "Nothing";
  dateOfBirth = "Nothing";
  gender = "Nothing";
}

Person::Person(long pId, string pName, string pEmail, string pAddress, string pDateOfBirth, string pGender)
{
  id = pId;
  name = pName;
  email = pEmail;
  address = pAddress;
  dateOfBirth = pDateOfBirth;
  gender = pGender;
}

void Person::print() const
{
  cout << "ID: " << id << endl;
  cout << "Name: " << name << endl;
  cout << "Email: " << email << endl;
  cout << "Address: " << address << endl;
  cout << "Date of Birth: " << dateOfBirth << endl;
  cout << "Gender: " << gender << endl;
}

这里是 Student.h

#ifndef Student_H
#define Student_H
#include<string>
#include <vector>
#include "Person.h"
#include "Course.h"
using namespace std;

class Student:public Person
{
 protected:
  int yearOfStudy;
  string major;
  long advisorId;
  vector <Course> coursesTaken;
  static long nextStId;

 public:
  Student();
  Student(string sName, string sEmail, string sAddress, string sDateOfBirth, string sG\
ender, int sYearOfStudy, string sMajor, long sAdvistorId);
  void print() const;
};
#endif

这是Student.C

#include<iostream>
#include "Student.h"
using namespace std;

long Student::nextStId = 500;

Student::Student():Person(nextStId)
{
  yearOfStudy = 0;
  major = " ";
  advisorId = 0;
}

Student::Student(string sName, string sEmail, string sAddress, string sDateOfBirth, st\
ring sGender, int sYearOfStudy, string sMajor, long sAdvisorId):Person(nextStId, sName\
, sEmail, sAddress,sDateOfBirth, sGender)
{
  yearOfStudy = sYearOfStudy;
  major = sMajor;
  advisorId = sAdvisorId;
}

void Student::print() const
{
  Person::print();
  cout << "Year of study: " << yearOfStudy << endl;
  cout << "Major: " << major << endl;
  cout << "Advisor ID: " << advisorId << endl;
}

现在主要是：

#include <iostream>
#include <string>
#include "Faculty.h"
#include "Student.h"
#include "Person.h"
using namespace std;

int main()
{
  Student test1;
  Faculty test2;
  test1.print();
  cout << endl;
  test2.print();

  return 0;
}

我尝试编译时收到的错误是：

 g++ Assignment3.C Person.C Student.C Faculty.C
Assignment3.C: In function âint main()â:
Assignment3.C:10: error: âStudentâ was not declared in this scope
Assignment3.C:10: error: expected `;' before âtest1â
Assignment3.C:12: error: âtest1â was not declared in this scope

我不明白为什么它给了我这个错误。我的教师课似乎运行得非常好。有人可以帮忙吗！

Answer 1

我不是专家，但你不需要在test1之后有（）吗？像学生 test1();我知道这与错误无关，但您可以检查。