View Compilation Error

0_0_35274547_20.cpp: In function 'int main()':
0_0_35274547_20.cpp:52:25: error: 'scanf_s' was not declared in this scope
     scanf_s("%d", &count);
                         ^
0_0_35274547_20.cpp:58:40: error: 'memset' was not declared in this scope
         memset(T, 0, sizeof(int) * tlen);
                                        ^