View Compilation Error

0_0_16775049_27495.cpp: In function 'bool bfs(int, int)':
0_0_16775049_27495.cpp:21:45: error: 'memset' was not declared in this scope
  memset(visited, false, sizeof(bool) * MAX_M);
                                             ^
0_0_16775049_27495.cpp: In function 'void getInput()':
0_0_16775049_27495.cpp:74:46: error: 'memset' was not declared in this scope
   memset(flow, 0, sizeof(int) * MAX_N * MAX_N);
                                              ^