View Compilation Error

0_0_30005386_21533.cpp: In function 'int bfs(int, int)':
0_0_30005386_21533.cpp:31:18: error: assignment of read-only location '*(bfs + (((sizetype)i) + ((sizetype)j)))'
         bfs[i][j]=0;
                  ^
0_0_30005386_21533.cpp:31:18: error: cannot convert 'int' to 'int(int, int)' in assignment