View Compilation Error

0_0_28654424_3502.cpp: In function 'int main()':
0_0_28654424_3502.cpp:13:26: error: 'scanf_s' was not declared in this scope
  while (scanf_s("%d", &_N) != EOF && _N>0)
                          ^
0_0_28654424_3502.cpp:17:25: error: 'memset' was not declared in this scope
   memset(V, 0, sizeof(V));
                         ^