View Compilation Error

303848_0_24423.cpp: In function `int main()':
303848_0_24423.cpp:3: error: `scanf' undeclared (first use this function)
303848_0_24423.cpp:3: error: (Each undeclared identifier is reported only once for each function it appears in.)
303848_0_24423.cpp:9: error: `printf' undeclared (first use this function)