View Compilation Error

223934_0_28900.cpp: In function `int main()':
223934_0_28900.cpp:4: error: `cin' undeclared (first use this function)
223934_0_28900.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
223934_0_28900.cpp:15: error: `cout' undeclared (first use this function)
223934_0_28900.cpp:15: error: `endl' undeclared (first use this function)