View Compilation Error

204827_0_8414.cpp: In function `int main()':
204827_0_8414.cpp:6: error: `cin' undeclared (first use this function)
204827_0_8414.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
204827_0_8414.cpp:9: error: `cout' undeclared (first use this function)
204827_0_8414.cpp:9: error: `endl' undeclared (first use this function)