View Compilation Error

187812_0_12433.cpp: In function `int main()':
187812_0_12433.cpp:6: error: `cin' undeclared (first use this function)
187812_0_12433.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
187812_0_12433.cpp:11: error: `cout' undeclared (first use this function)
187812_0_12433.cpp:11: error: `endl' undeclared (first use this function)