function y=Ex0517(m)
% EX0517 用循環(huán)流程控制語句創(chuàng)建矩陣
y=0;
m=m-1;
for n=1:m
   y=[0,y];
end
for n=1:m
   a=1:n;
   b=a;
   for k=m:-1:n
      b=[0,b];
   end
   y=[b;y];
   n=n+1; 
end