anchor.diff:  }
   	:	'while' '(' expr ')' '{' block '}'
   		{
  -			tabs.addTab();
  -			$name = "while(" + $expr.name + ") {\n" + tabs.tab()  + $block.name + tabs.tab() + "}";
  +			
  +			$name = "while(" + $expr.name + ") {\n" + "\t"  + $block.name + "\t" + "}";
   			
   		}
   	;
  
positive.code: }
  	:	type decVariable
  		{
  			$name = tabs.tab() + $type.name + " " + $decVariable.name + "\n";
  			CurVariable.type = $type.name;
  			VariableList.add(CurVariable);
  
  
negative.code: }
  	:	'for' '(' forPara ';' expr ';' normalExp ')' '{' block '}'
  		{
  			
  			$name = "for(" + $forPara.name + "; " + $expr.name + "; " + $normalExp.name + ") {\n" + "\t" + $block.name +  "\t" + "}";
  			
  		}
  	;
  