View Compilation Error

509986_0_0_19974.cpp: In function `int main()':
509986_0_0_19974.cpp:4: error: `scanf' undeclared (first use this function)
509986_0_0_19974.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
509986_0_0_19974.cpp:4: error: `EOF' undeclared (first use this function)
509986_0_0_19974.cpp:6: error: `printf' undeclared (first use this function)