View Compilation Error

2_20955_1527608_20191.cpp: In function `int main()':
2_20955_1527608_20191.cpp:9: error: `scanf_s' undeclared (first use this function)
2_20955_1527608_20191.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
2_20955_1527608_20191.cpp:24: error: `printf_s' undeclared (first use this function)