View Compilation Error

0_0_13166020_6579.cpp: In function 'void BFS()':
0_0_13166020_6579.cpp:32:69: error: lvalue required as left operand of assignment
                 if( next.z < 0 || next.z = a || next.c < 0 || next.c=b || vis[next.z][next.c]==1 )continue;
                                                                     ^
0_0_13166020_6579.cpp: At global scope:
0_0_13166020_6579.cpp:43:12: error: expected constructor, destructor, or type conversion before '(' token
     }printf("Poor ANGEL has to stay in the prison all his life.\n");
            ^
0_0_13166020_6579.cpp:44:1: error: expected declaration before '}' token
 }
 ^