View Compilation Error

143151_0_26053.cpp: In function `int main()':
143151_0_26053.cpp:4: error: `scanf' undeclared (first use this function)
143151_0_26053.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
143151_0_26053.cpp:6: error: `printf' undeclared (first use this function)