View Compilation Error

447311_0_0_979.cpp: In function `int main()':
447311_0_0_979.cpp:16: error: `cout' undeclared (first use this function)
447311_0_0_979.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
447311_0_0_979.cpp:16: error: `endl' undeclared (first use this function)