View Compilation Error

0_0_20796538_13309.cpp: In function 'int bfs()':
0_0_20796538_13309.cpp:14:41: error: 'memset' was not declared in this scope
         memset(visit,false,sizeof(visit));
                                         ^
0_0_20796538_13309.cpp: In function 'int main()':
0_0_20796538_13309.cpp:35:36: error: 'memset' was not declared in this scope
         memset(maze,-1,sizeof(maze));
                                    ^