View Compilation Error

313431_0_3084.cpp: In function `int main()':
313431_0_3084.cpp:1: error: `scanf' undeclared (first use this function)
313431_0_3084.cpp:1: error: (Each undeclared identifier is reported only once for each function it appears in.)
313431_0_3084.cpp:1: error: `printf' undeclared (first use this function)