Как сделать вывод переменных из функции в Edit?

Edit4 -> Text = IntToStr(q);
Edit5 -> Text = IntToStr(b[0]);

Form1->Edit4 -> Text = IntToStr(q);

#include <string>
 
....
 
String str(String test){
return test;
}
 
....
 
Edit4 -> Text = ("Hello world");

//---------------------------------------------------------------------------
 
#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <System.Classes.hpp>
#include <Vcl.Controls.hpp>
#include <Vcl.StdCtrls.hpp>
#include <Vcl.Forms.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:    // IDE-managed Components
    void __fastcall FormCreate(TObject *Sender);
private:    // User declarations
public:     // User declarations
    __fastcall TForm1(TComponent* Owner);
       void str(String test);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

void TForm1::str(String test){
Edit1 -> Text = (test);
}
 
...
 
str("Hello world");