View Compilation Error

0_0_32381405_21028.cpp: In function 'int main()':
0_0_32381405_21028.cpp:8:25: error: 'scanf_s' was not declared in this scope
  while (scanf_s("%d", &n) && n) {
                         ^
0_0_32381405_21028.cpp:9:25: error: 'memset' was not declared in this scope
   memset(a, 0, sizeof(a));
                         ^