View Compilation Error

29138_0_27146.cpp: In function `int main()':
29138_0_27146.cpp:4: error: `scanf' undeclared (first use this function)
29138_0_27146.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
29138_0_27146.cpp:4: error: `EOF' undeclared (first use this function)
29138_0_27146.cpp:15: error: `printf' undeclared (first use this function)