View Compilation Error

0_0_18996306_9787.cpp: In function 'void bfs(int&, int)':
0_0_18996306_9787.cpp:16:30: error: 'memset' was not declared in this scope
  memset(flow, 0, sizeof(flow));
                              ^
0_0_18996306_9787.cpp: In function 'int main()':
0_0_18996306_9787.cpp:56:27: error: 'memset' was not declared in this scope
   memset(cap,0,sizeof(cap));
                           ^