View Compilation Error

0_0_15022072_28040.cpp: In function 'int main()':
0_0_15022072_28040.cpp:42:62: error: 'scanf_s' was not declared in this scope
     scanf_s("%d:%d:%d %d:%d:%d", &a1, &b1, &c1, &a2, &b2, &c2);
                                                              ^