上代码：
%
x = -7:7
y = OnesComplement(x, 4)
函数OnesComplement代码：
function [y] = OnesComplement(x, B);
% Decimal equivalent of Sign-Magnitude format integer
% to b-bit Ones'-Complement format conversion
% ----------------------------------------------------------
% [y] = ladrfilt(x, B)
% x = integer between -2^(b-1) < x < 2^(b-1) (sign-magnitude)
% y = integer between 0 <= y <= 2^b-1 (1's-complement)
%
%
if any((x <= -2^(B-1) | (x >= 2^(B-1))))
error('Numbers must satisfy -2^(B-1) < x < 2^(B-1)')
end
s = sign(x); % sign of x (-1 if x<0, 0 if x=0, 1 if x>0)
sb = (s < 0); % sign-bit (0 if x>=0, 1 if x<0)
y = (1-sb) .* x + sb .* bitcmp(abs(x), B);
运行结果：
