View Compilation Error

167282_0_7950.cpp: In function `int main()':
167282_0_7950.cpp:6: error: `scanf' undeclared (first use this function)
167282_0_7950.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
167282_0_7950.cpp:6: error: `EOF' undeclared (first use this function)
167282_0_7950.cpp:7: error: `printf' undeclared (first use this function)