View Compilation Error

228914_0_467.cpp: In function `int main()':
228914_0_467.cpp:30: error: `scanf' undeclared (first use this function)
228914_0_467.cpp:30: error: (Each undeclared identifier is reported only once for each function it appears in.)
228914_0_467.cpp:66: error: `printf' undeclared (first use this function)