View Compilation Error

305500_0_17421.cpp: In function `int main()':
305500_0_17421.cpp:5: error: `scanf' undeclared (first use this function)
305500_0_17421.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
305500_0_17421.cpp:5: error: `EOF' undeclared (first use this function)
305500_0_17421.cpp:12: error: `printf' undeclared (first use this function)