View Compilation Error

303013_0_10285.cpp: In function `int main()':
303013_0_10285.cpp:1: error: `scanf' undeclared (first use this function)
303013_0_10285.cpp:1: error: (Each undeclared identifier is reported only once for each function it appears in.)
303013_0_10285.cpp:1: error: `printf' undeclared (first use this function)