View Compilation Error

809325_0_0_32196.cpp: In function `int main()':
809325_0_0_32196.cpp:3: error: `scanf' undeclared (first use this function)
809325_0_0_32196.cpp:3: error: (Each undeclared identifier is reported only once for each function it appears in.)
809325_0_0_32196.cpp:4: error: `printf' undeclared (first use this function)