View Compilation Error

0_0_35508543_14766.cpp: In function 'void dij(int)':
0_0_35508543_14766.cpp:11:28: error: 'memset' was not declared in this scope
  memset(vis, 0, sizeof(vis));
                            ^
0_0_35508543_14766.cpp: In function 'int main()':
0_0_35508543_14766.cpp:48:32: error: 'scanf_s' was not declared in this scope
  while (scanf_s("%d %d", &n, &m) != EOF)
                                ^