function y=deci2bin(x,t)
% 十進(jìn)制數(shù)x轉(zhuǎn)化為二進(jìn)制數(shù)，二進(jìn)制數(shù)至少表示為t位

y=zeros(1,t);
i=1;
while x>=0&i<=t
    y(i)=rem(x,2);
    x=(x-y(i))/2;
    i=i+1;
end
y=y(t:-1:1);