Shi, check out
fileID = fopen('num.txt','w');
while (i<10)
x = input('enter the number: ');
if isreal(x) % no action?
if isinteger(x) % no action?
end
end
if (x>255)
disp('"error:Value too big."');
elseif ((x>=0) && (x<=255))
disp(['<',num2str(x),'>']); % display the value of x
i = i+1; % increment i if x in range
fprintf(fileID,'%d\n',x);
else
disp('-1'); % display string '-1'
end
end
fclose(fileID);
