View Compilation Error

0_0_16846779_4172.cpp: In function 'int bfs()':
0_0_16846779_4172.cpp:40:30: error: 'memset' was not declared in this scope
  memset(vis,false,sizeof(vis));
                              ^
0_0_16846779_4172.cpp: In function 'int main()':
0_0_16846779_4172.cpp:99:32: error: 'memset' was not declared in this scope
    memset(map,false,sizeof(map));
                                ^