View Compilation Error

0_0_36187562_2391.cpp: In function 'bool bfs(int, int, int, int)':
0_0_36187562_2391.cpp:11:75: error: lvalue required as left operand of assignment
   if (maze[sx][sy] != maze[ex][ey] || maze[sx][sy] == 0 || (sx == ex &&sy = ey))
                                                                           ^