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View Compilation Error

0_0_15730493_857.cpp: In function 'int main()':
0_0_15730493_857.cpp:6:43: error: 'scanf_s' was not declared in this scope
  while (scanf_s("%lf%lf%lf%lf",&a,&b,&c,&d)!=EOF) {
                                           ^


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