View Compilation Error

777837_0_0_4948.cpp: In function `int main()':
777837_0_0_4948.cpp:4: error: `eof' undeclared (first use this function)
777837_0_0_4948.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
777837_0_0_4948.cpp:6: error: `scanf' undeclared (first use this function)
777837_0_0_4948.cpp:7: error: `printf' undeclared (first use this function)