View Compilation Error

773985_0_0_18716.cpp: In function `int main()':
773985_0_0_18716.cpp:1: error: `scanf' undeclared (first use this function)
773985_0_0_18716.cpp:1: error: (Each undeclared identifier is reported only once for each function it appears in.)
773985_0_0_18716.cpp:1: error: `printf' undeclared (first use this function)