View Compilation Error

0_0_14460969_11020.cpp: In function 'void built(int, int, int)':
0_0_14460969_11020.cpp:20:27: error: 'scanf_s' was not declared in this scope
   scanf_s("%d",&sum[index]);
                           ^
0_0_14460969_11020.cpp: In function 'void solved(int)':
0_0_14460969_11020.cpp:81:26: error: 'scanf_s' was not declared in this scope
    scanf_s("%d%d", &a, &b);
                          ^