View Compilation Error

651751_0_0_30653.cpp: In function `int main()':
651751_0_0_30653.cpp:2: error: `cin' undeclared (first use this function)
651751_0_0_30653.cpp:2: error: (Each undeclared identifier is reported only once for each function it appears in.)
651751_0_0_30653.cpp:2: error: `cout' undeclared (first use this function)
651751_0_0_30653.cpp:2: error: `endl' undeclared (first use this function)