View Compilation Error

26557_0_6361.cpp: In function `int main()':
26557_0_6361.cpp:7: error: `scanf' undeclared (first use this function)
26557_0_6361.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
26557_0_6361.cpp:24: error: `printf' undeclared (first use this function)