View Compilation Error

978058_0_0_27982.cpp: In function `int main()':
978058_0_0_27982.cpp:15: error: `scanf' undeclared (first use this function)
978058_0_0_27982.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
978058_0_0_27982.cpp:18: error: `puts' undeclared (first use this function)