View Compilation Error

646882_0_0_18039.cpp: In function `int main()':
646882_0_0_18039.cpp:8: error: `cin' undeclared (first use this function)
646882_0_0_18039.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
646882_0_0_18039.cpp:27: error: `cout' undeclared (first use this function)
646882_0_0_18039.cpp:27: error: `endl' undeclared (first use this function)