IntelliSense: no operator "<<" matches these operands ) and LNK1120/2001 unresolved - lnk2001

Question

I am working on a assignment for school and I am having some issues i havnet been able to figure out
I got 2 files Stundet.cpp and Student.h
in my Student.h i am declaring a Student class
#include<string.h>
#include<string>
#include<iostream>
using namespace std;
class Student
{private:
string fname;
string lname;
int ID;
public:
Student();
Student(string first,string last, int ID_num);
static int numberOfStudents;
void getName();
void getID();
};
in my Student.cpp i got
`#include <iostream>
#include "Student.h"
#include <string>
using namespace std;
Student::Student()
{numberOfStudents+=1;
}
Student::Student(string first, string last, int ID_num)
{fname=first;
lname=last;
ID=ID_num;
numberOfStudents+=1;}
int Student::numberOfStudents=0;
void Student::getName()
{cout<<fname<<lname;}
void Student::getID()
{cout<<ID;}
main()
{
Student st1("Hakan", "Haberdar", 1234), st2("Charu", "Hans", 2345), st3("Tarikul", "Islam", 5442), st4;
cout << "We created " << Student::numberOfStudents << " student objects." << endl;
cout << st1.getID() << " " << st1.getName() << endl;
cout << st2.getID() << " " << st2.getName() << endl;
cout << st3.getID() << " " << st3.getName() << endl;
cout << st4.getID() << " " << st4.getName() << endl;
system("pause");
} `
my first issue is that i keep getting these external errors that i have no idea how to fix, ive looked around but i dont really understand how to apply what i find. My errors are
Error 1 error LNK2001: unresolved external symbol _WinMainCRTStartup C:\Users\Tato- laptop\Documents\Visual Studio 2010\Projects\Student Class\Student Class\LINK
and
Error 2 error LNK1120: 1 unresolved externals C:\Users\Tato- laptop\Documents\Visual Studio 2010\Projects\Student Class\Debug\Student Class.exe 1
My second issues is that the couts in the .cpp file stopped working, i understand im supposed to overload them or something but I dont really understand how
Any help would be appreciated.