First of all, Never use built-in functions as variable or scripts names.
You should modify the names of the scripts; for e.g. by adding a prefix as I have done below (or a suffix), or change the names entirely.
Second, you need to store the names as strings or cell array of char vectors -
a = 'script_add.m';
b = 'script_split.m';
c = 'script_find.m';
%Check the output of concatenating the names directly
d = [a b c]
%First three elements
d(1:3)
%Store in cell array
names = {a, b, c};
for k=1:numel(names)
try
run(names{k})
catch
disp('It does not work')
end
end
