View Compilation Error

0_0_32853136_20111.cpp: In function 'bool bfs1()':
0_0_32853136_20111.cpp:20:28: error: 'memset' was not declared in this scope
  memset(vis, 0, sizeof(vis));
                            ^
0_0_32853136_20111.cpp: In function 'void bfs2()':
0_0_32853136_20111.cpp:56:30: error: 'memset' was not declared in this scope
  memset(vis1, 0, sizeof(vis1));
                              ^