I am having problems compiling and running this program

insert

Code:

---


#ifndef EMPLOYEE_TYPE_FLAG
#define EMPLOYEE_TYPE_FLAG

#include <iostream>
using namespace std;



struct employee_type
{
    char ssn[10];
 
 
    employee_type()
    {
        ssn[0]='\0';
    }

    bool operator > (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) >0;
    }
    bool operator < (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) <0;
    }
      bool operator >= (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) >=0;
    }
   
      bool operator <= (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) <=0;
    }
      bool operator != (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) !=0;
    }

    employee_type &operator = (employee_type &e)
    {
        strncpy(this->ssn, e.ssn, 10);
        return *this;
    }

    friend ostream &operator<<(ostream &os, employee_type &e)
    {
        os<<e.ssn<<'\n';
        return os;
    }
   
int main()
{
cout << "Test" << endl;
}
};
#endif

---

This is the code i am getting this error:
ld returned 1 exit status
[Linker error] undefined reference to `WinMain@16'

Does anyone know a solution to this?

In C++ you don't put the main function into a class/struct, it's a free function :) (Actually it seems like a hideous practice in C# tutorials that the main function belongs to some rather arbitrary class.)

Next you'll need to include <cstring> for functions like strncpy.

It is also unclear whether this is supposed to be a header (include guards)? Headers on their own are not supposed to be compileable.

Thanks. But im still getting the same error. I commented out the other headers. This is what I have:

Code:

---

//#ifndef EMPLOYEE_TYPE_FLAG
//#define EMPLOYEE_TYPE_FLAG

#include <iostream>
#include <cstring>
using namespace std;



struct employee_type
{
    char ssn[10];
 
 
    employee_type()
    {
        ssn[0]='\0';
    }

    bool operator > (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) >0;
    }
    bool operator < (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) <0;
    }
      bool operator >= (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) >=0;
    }
   
      bool operator <= (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) <=0;
    }
      bool operator != (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) !=0;
    }

    employee_type &operator = (employee_type &e)
    {
        strncpy(this->ssn, e.ssn, 10);
        return *this;
    }

    friend ostream &operator<<(ostream &os, employee_type &e)
    {
        os<<e.ssn<<'\n';
        return os;
    }
   

};
//#endif

---

I am getting the same error. Any reason why?

You need to have a main function, in order to have a program.

What should or could I put in the main function

Your previous main function was fine. It just needs to be there, not part of your employee struct.

Code:

---


//#ifndef EMPLOYEE_TYPE_FLAG
//#define EMPLOYEE_TYPE_FLAG

#include <iostream>
using namespace std;



struct employee_type
{
    char ssn[10];
 
 
    employee_type()
    {
        ssn[0]='\0';
    }

    bool operator > (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) >0;
    }
    bool operator < (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) <0;
    }
      bool operator >= (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) >=0;
    }
   
      bool operator <= (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) <=0;
    }
      bool operator != (employee_type &e)
    {
        return strncmp(this->ssn, e.ssn, 10) !=0;
    }

    employee_type &operator = (employee_type &e)
    {
        strncpy(this->ssn, e.ssn, 10);
        return *this;
    }

    friend ostream &operator<<(ostream &os, employee_type &e)
    {
        os<<e.ssn<<'\n';
        return os;
    }
    int main()
{
cout << "Test" << endl;
}

};
//#endif

---

I have that now. And still getting the same error. hmm

It's still inside the struct definition. Put it after the closing brace.

Now it compiled. Thanks alot. I am now asked to write a drivers program for it. I have never written one before but this is what I have. I do not believe I am doing it right. Can anyone verify or tell me what I need to do/change.

Code:

---

#include<iostream>

using namespace std;


int main()
{
   
    int e1=1111;
    int e2=2222;
   
    if (e1 > e2)
    cout << "Good" << endl;
    else
    {
        cout << "Bad" << endl;
    }
    cout << "-------------------------------------" << endl << endl;
   
    if (e1 < e2)
    cout << "Good" << endl;
    else
    {
        cout << "Bad" << endl;
    }
    cout << "-------------------------------------" << endl << endl;
   
    if (e1 >= e2)
    cout << "Good" << endl;
    else
    {
        cout << "Bad" << endl;
    }
    cout << "-------------------------------------" << endl << endl;
   
    if (e1 <= e2)
    cout << "Good" << endl;
    else
    {
        cout << "Bad" << endl;
    }
    cout << "-------------------------------------" << endl << endl;
   
    if (e1 != e2)
    cout << "Good" << endl;
    else
    {
        cout << "Bad" << endl;
    }
    cout << "-------------------------------------" << endl << endl;
   
    if (e1 == e2)
    cout << "Good" << endl;
    else
    {
        cout << "Bad" << endl;
    }
    cout << "-------------------------------------" << endl << endl;
   
   
   


system("pause");

return 0;
}

---

C Board - Homework Policy

What are you trying to do, what have you tried, why are you doing it that way?

'Seek and ye shall find', but first you need to provide details of what you are seeking.

99% of the time, when someone is asking US for help on their homework, they should be asking the instructor. After all, any help he gives you won't be considered an honor code violation.

>> I am now asked to write a drivers program for it.

A driver program is a program that takes the struct or class you have (in this case it would be the employee_type struct) and uses the functions provided by the struct to show that they work.

Your attempt at a driver program does not use the struct. Change it to use the struct.