function y = crypto(x)
% CRYPTO Cryptography example.
% y = crypto(x) converts an ASCII text string into another
% coded string. The function is its own inverse, so
% crypto(crypto(x)) gives x back.
% See also: ENCRYPT.

% Use a two-character Hill cipher with arithmetic
% modulo 97, a prime.
p = 97;

c1 = char(169);
c2 = char(174);
x(x==c1) = 127;
x(x==c2) = 128;

x = mod(real(x-32),p);

n = 2*floor(length(x)/2);
X = reshape(x(1:n),2,n/2);

% Encode with matrix multiplication modulo p.
A = [71 2; 2 26];
Y = mod(A*X,p);

y = reshape(Y,1,n);

if length(x) > n
y(n+1) = mod((p-1)*x(n+1),p);
end
y = char(y+32);
y(y==127) = c1;
y(y==128) = c2;
y = crypto('Hello world')
x = 'Hello world'

과제인데

pdf보고하는데 여기까지 나오고

x =
40 69 76 76 79 0 87 79 82 76 68

이 값을 얻어야하거덩?

근데 자꾸

function y = crypto(x)

쪽에서 에러가있대...

뭐가문제야