/in/foo.cc: In function 'int anbu(int (*)[500], int, int)':
/in/foo.cc:17:7: error: 'j1' was not declared in this scope
    if(j1<n)
       ^~
/in/foo.cc:25:7: error: 'i1' was not declared in this scope
    if(i1<m)
       ^~