View Compilation Error

47094_0_22216.cpp: In function `int main()':
47094_0_22216.cpp:5: error: `cin' undeclared (first use this function)
47094_0_22216.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
47094_0_22216.cpp:11: error: `cout' undeclared (first use this function)
47094_0_22216.cpp:11: error: `endl' undeclared (first use this function)