View Compilation Error

423937_0_0_29786.cpp: In function `int main()':
423937_0_0_29786.cpp:4: error: `scanf' undeclared (first use this function)
423937_0_0_29786.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
423937_0_0_29786.cpp:4: error: `EOF' undeclared (first use this function)
423937_0_0_29786.cpp:11: error: `printf' undeclared (first use this function)