Implementation file unable to identify class name from C++ Header file [duplicate] - c++

Question

This question already has answers here:
Can't access function from header file
(2 answers)
Closed 6 years ago.
I am learning C++. I am practising splitting my C++ class into separate files- implementation and header files namely Student_Impl.cpp and Student_Header.h. And then there is a driver file Student_register.cpp which will create 3 Student objects. However, when I try to build it, it's throwing errors stating Student is not a namespace or class. I have included the Student_Header.h (where Student class declaration is present) in my implementation file Student_Impl.cpp and driver file Student_register.cpp but it still throwing the same errors. What can be the possible cause ? I am using Visual Studio 2015.
Student_Header.h
#pragma once
#include <string>
using namespace std;
class Student {
private:
string fname;
string lname;
string address;
string city;
string phone;
int age;
public:
Student();
Student(string, string, string, string, string, int);
~Student();
string get_fname();
string get_lname();
string get_address();
string get_city();
string get_phone();
int get_age();
};
Student_Impl.cpp
#include "Student_Header.h"
#include "iostream"
#include "stdafx.h"
#include <string>
using namespace std;
Student::Student()
{
}
Student::Student(string fname1, string lname1, string address1, string city1, string phone1, int age1)
{
fname = fname1;
lname = lname1;
address = address1;
city = city1;
phone = phone1;
age = age1;
}
string Student::get_fname()
{
return fname;
}
string Student::get_lname()
{
return lname;
}
string Student::get_address()
{
return address;
}
string Student::get_city()
{
return city;
}
string Student::get_phone()
{
return phone;
}
int Student::get_age()
{
return age;
}
Student::~Student()
{}
Student_register.cpp
#include "stdafx.h"
#include "Student_Header.h"
#include <string>
#include "iostream"
using namespace std;
int main()
{
Student Student1("Mike", "J", "MikeAdd", "MikeCity", "MikePhone", 26);
Student Student2("Jack", "R", "JackAdd", "JackCity", "JackPhone", 25);
Student Student3("Roney", "M", "RoneyAdd", "RoneyCity", "RoneyPhone", 27);
// code for data retrieval
return 0;
}

Answer 1

Marvin Sielenkemper put the correct answer in the comment - headers prior to "stdafx.h" are ignored. This is an implementation-specific side effect of how precompiled headers work on Visual Studio.
Also, use #include <iostream> instead of #include "iostream". The <header> form is for standard headers, the "header.h" is for your own headers.