How could I make a program where an excel file is a input?

I mean you have to tell the program just the name of the excel file. I know this doesn't work, but it can help you to understand what I mean.

function
P = input('excell name = ')
t = xlsread('P')
end

Answer 1

[KSSV]

function t = readexel(filename)
if ~ischar(filename)
    error('input hsould be a filename')
end
t = xlsread(filename)
end

You can try like the above.