View Compilation Error

0_0_35163974_2768.cpp: In function 'void HDU2052()':
0_0_35163974_2768.cpp:9:80: error: 'scanf_s' was not declared in this scope
  while (~scanf_s("%lf %d %lf %lf %lf %lf %lf", &L, &n, &c2, &t, &vr, &vt1, &vt2)) {
                                                                                ^