View Compilation Error

651761_0_0_893.cpp: In function `int main()':
651761_0_0_893.cpp:2: error: `cin' undeclared (first use this function)
651761_0_0_893.cpp:2: error: (Each undeclared identifier is reported only once for each function it appears in.)
651761_0_0_893.cpp:2: error: `cout' undeclared (first use this function)
651761_0_0_893.cpp:2: error: `endl' undeclared (first use this function)