View Compilation Error

225945_0_15724.cpp: In function `int main()':
225945_0_15724.cpp:13: error: `scanf' undeclared (first use this function)
225945_0_15724.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
225945_0_15724.cpp:16: error: `printf' undeclared (first use this function)