View Compilation Error

42418_0_2930.cpp: In function `int main()':
42418_0_2930.cpp:3: error: `cin' undeclared (first use this function)
42418_0_2930.cpp:3: error: (Each undeclared identifier is reported only once for each function it appears in.)
42418_0_2930.cpp:19: error: `cout' undeclared (first use this function)
42418_0_2930.cpp:19: error: `endl' undeclared (first use this function)