View Compilation Error

930141_0_0_32048.cpp: In function `int main()':
930141_0_0_32048.cpp:17: error: `scanf' undeclared (first use this function)
930141_0_0_32048.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
930141_0_0_32048.cpp:21: error: `printf' undeclared (first use this function)