#include "stdio.h"
void __fastcall TForm1::Button1Click(TObject *Sender)
{
    char ch[10];
    sprintf(ch,"%0.3f",10/3.0);
    Edit1->Text = ch;
}
 

   #include<Math.hpp>       double tmp;       tmp=RoundTo((double)10/3,-3);       Edit1->Text=tmp; 

 
char a[5]={0x01,0x05,0xff,0xee,0xaa};
for(int i=0;i<5;i  )
{
   int iV = a[i];
   Edit1->Text =  Edit1->Text Edit1->Text.sprintf("%0.3f  ",iV/3.0);
}