function y=Testlab (n)
if n<=10
fprintf('ten or less\s');
elseif n<20
fprintf('greater than ten but less than twenty\s')
elseif n<30
fprintf('twenty or greater but less than thirty\s')
else
fprintf('thirty or great\s')
end
为啥老是出现error???
Input argument "n" is undefined.
Error in ==> Testlab at 2
if n<=10