%10-34  溯warningʹá
%ȱMļ£Ŀ2ʱĳ˻Ŀ1ʱϢƽ12ʱϢ¡
function z=warning1(x,y)
if nargin==2
    z=x*y;
elseif nargin==1
     {
    warning('you should input 2 arguments')
     }
    else
    error('Wrong number of input arguments')
end

%н¡
>> warning1(1)
Warning: you should input 2 arguments
> In warning1 at 6
ans = 
    {''}
>> warning1(1,2)
ans =
     2
>> warning1(1,2,3)
??? Error using ==> warning1
Too many input arguments.
>>
