View Compilation Error

394948_0_0_2026.cpp: In function `int main()':
394948_0_0_2026.cpp:4: error: `cin' undeclared (first use this function)
394948_0_0_2026.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
394948_0_0_2026.cpp:6: error: `cout' undeclared (first use this function)
394948_0_0_2026.cpp:6: error: `endl' undeclared (first use this function)