cannot return a value с++ builder

#include <vcl.h>
#pragma hdrstop
 
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
int rr; String ll;
randomize;
rr=random(26);
switch(rr){
case 0: return ll='q';
case 1: return ll='w';
case 2: return ll='e';
case 3: return ll='r';
case 4: return ll='t';
case 5: return ll='y';
case 6: return ll='u';
case 7: return ll='i';
case 8: return ll='o';
case 9: return ll='p';
case 10: return ll='a';
case 11: return ll='s';
case 12: return ll='d';
case 13: return ll='f';
case 14: return ll='g';
case 15: return ll='h';
case 16: return ll='j';
case 17: return ll='k';
case 18: return ll='l';
case 19: return ll='z';
case 20: return ll='x';
case 21: return ll='c';
case 22: return ll='v';
case 23: return ll='b';
case 24: return ll='n';
case 25: return ll='m';
}

String ll;

switch(rr){
 case 0: ll = "q";
break;
 case 1: ll = "w";
break;
 case 2: ll = "e";
break;

String s;
s = 'e';

switch(rr){
case 0: ll='q';return;
case 1: ll='w';return;
case 2: ll='e';return;
case 3: ll='r';return;
case 4: ll='t';return;
//.....
}

case 0: ll='q'; break;

char keybd[] = { 'q','w','e', ...  };