1. main.cpp

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

int main()
{
    int x = 3;
    cout << x << endl;
    Sally sal;
    sal.printShiz();
    const Sally sal2;
    sal2.printShiz2();
    return 0;
}

2.Sally.h

ifndef SALLY_H

define SALLY_H

class Sally
{
public:
Sally();
void printShiz();
void printShiz2() const;
protected:
private:
};

endif // SALLY_H

3.Sally.cpp

include "Sally.h"

include <iostream>

using namespace std;

Sally::Sally()
{
}

void Sally::printShiz()
{
cout << "first" << endl;
}

void Sally::printShiz2() const
{
cout << "second" << endl;
}