View Compilation Error

241886_0_19866.cpp: In function `int main()':
241886_0_19866.cpp:5: error: `scanf' undeclared (first use this function)
241886_0_19866.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
241886_0_19866.cpp:20: error: `printf' undeclared (first use this function)