View Compilation Error

646227_0_0_23136.cpp: In function `int main(int, char**)':
646227_0_0_23136.cpp:4: error: `cin' undeclared (first use this function)
646227_0_0_23136.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
646227_0_0_23136.cpp:11: error: `cout' undeclared (first use this function)
646227_0_0_23136.cpp:11: error: `endl' undeclared (first use this function)
646227_0_0_23136.cpp:14: error: `system' undeclared (first use this function)