macOS xcode, c++, simple class

Hi!
I'm trying to write a very very simple program, that includes a simple class. A book object with one classdata. but the compiler just gives errors and I cant find whats wrong , can anyone help me.

////////////////////////////////////////////////
main file
////////////////////////////////////////////////
#include <iostream>
#include "TBook.h"

using namespace std;

int main() {

return 0;

////////////////////////////////////////////////
TBook.h
///////////////////////////////////////////////

#ifndef TBOOK_H
#define TBOOK_H

#include <string>

class TBook
{
public:
TBook(string title);
string GetTitle();

private:
const string Title;
};

#endif
////////////////////////////////////////////////////////////
TBook.cpp
////////////////////////////////////////////////////////////

#include "TBook.h"

Book::Book(string title);
: Title(title),
{
}

string Book::GetTitle() {
return Title;
}

////////////////////////////////////////////////////////////
xcode just gives me error when I try to compile the code.

TBook.h:19: error: expected `)' before "title"
TBook.h:20: error: 'string' does not name a type
TBook.h:25: error: 'string' does not name a type


What am I doing wrong???

xcode, c++, simple class

Thanx!

save2file

Do anyone know why I can't write to file with:

#include "test1.h"
#include <string>
#include <fstream>
#include <stdlib.h>
using namespace std;
.
.
.
void TBook::SaveBook(TBook book){

ofstream printa ( "testRTF.rtf");

if ( ! printa ) {
cout << "failed to open file \n"; //HERE
exit ( EXIT_FAILURE );
}

printa << "oh yeah baby!\n";

}


the compiler says: cout was not declared in this scope