View Compilation Error

102616_0_491.cpp: In function `int main()':
102616_0_491.cpp:20: error: `cin' undeclared (first use this function)
102616_0_491.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
102616_0_491.cpp:22: error: `cout' undeclared (first use this function)
102616_0_491.cpp:31: error: `endl' undeclared (first use this function)