int main ( void )
{
  signed char  cVar = 0;
         short sVar = 0;
         int   iVar = 0;
         long  lVar = 0;

  cVar = ( signed char ) sVar;  //遵循1
  sVar = ( short ) iVar;        //遵循2
  iVar = ( int ) lVar;          //遵循3

  return ( 0 );
}