/in/foo.cc: In function 'int CountAD(int (*)[500], int, int)':
/in/foo.cc:14:16: error: 'j1' was not declared in this scope
             if(j1<n)//还在范围内就出来了，所以忽略后面语句
                ^~
/in/foo.cc:19:16: error: 'i1' was not declared in this scope
             if(i1<m)
                ^~