View Compilation Error

0_0_25625241_26585.cpp: In function 'bool bfs()':
0_0_25625241_26585.cpp:26:28: error: 'memset' was not declared in this scope
  memset(vis, 0, sizeof(vis));
                            ^
0_0_25625241_26585.cpp: In function 'int maxflow()':
0_0_25625241_26585.cpp:61:29: error: 'memset' was not declared in this scope
   memset(cur, 0, sizeof(cur));
                             ^