View Compilation Error

25936_0_18754.cpp: In function `int main()':
25936_0_18754.cpp:4: error: `cin' undeclared (first use this function)
25936_0_18754.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
25936_0_18754.cpp:7: error: `cout' undeclared (first use this function)
25936_0_18754.cpp:7: error: `endl' undeclared (first use this function)