View Compilation Error

940418_0_0_14935.cpp: In function `int main()':
940418_0_0_14935.cpp:6: error: `scanf' undeclared (first use this function)
940418_0_0_14935.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
940418_0_0_14935.cpp:9: error: `printf' undeclared (first use this function)