View Compilation Error

0_0_26844061_1704.cpp: In function 'int main()':
0_0_26844061_1704.cpp:19:33: error: 'scanf_s' was not declared in this scope
 #define TI() int T;scanf("%d",&T);while(T--)
                                 ^
0_0_26844061_1704.cpp:31:2: note: in expansion of macro 'TI'
  TI() {
  ^