a = textread('test.txt','%s');
b = strfind(a{1},'start@');
if isempty(b)
    error('file is not found.')
end
ts = a{1}(7:14);
t = sscanf(a{1},'start@%d/%d/%d_%d:%d:%f');
cl = clock';
dif = cl-t;
coe = 1; coe = [(coe(1)*60) coe]; coe = [(coe(1)*60) coe]; coe = [(coe(1)*24) coe];
coe = [0 0 coe]';
dif2 = sum(dif(3:end).*coe(3:end));
disp(['Œo‰ßŽžŠÔ‚Í' num2str(dif2) '•b']);

% clear b cl dif ts 
