View Compilation Error

663381_0_0_6311.cpp: In function `int main()':
663381_0_0_6311.cpp:2: error: `cin' undeclared (first use this function)
663381_0_0_6311.cpp:2: error: (Each undeclared identifier is reported only once for each function it appears in.)
663381_0_0_6311.cpp:2: error: `cout' undeclared (first use this function)
663381_0_0_6311.cpp:2: error: `endl' undeclared (first use this function)