matlab求航线图问题 学习

>> 
>> A1=[0,0,1,1;1,0,0,0;0,1,0,0;1,0,1,0]

A1 =

     0     0     1     1
     1     0     0     0
     0     1     0     0
     1     0     1     0

>> 
>> A2=A1*A1

A2 =

     1     1     1     0
     0     0     1     1
     1     0     0     0
     0     1     1     1

>>