View Compilation Error

940518_0_0_30180.cpp: In function `int main()':
940518_0_0_30180.cpp:6: error: `scanf' undeclared (first use this function)
940518_0_0_30180.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
940518_0_0_30180.cpp:9: error: `printf' undeclared (first use this function)