View Compilation Error

857926_0_0_23876.cpp: In function `int main()':
857926_0_0_23876.cpp:4: error: `cin' undeclared (first use this function)
857926_0_0_23876.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
857926_0_0_23876.cpp:7: error: `cout' undeclared (first use this function)
857926_0_0_23876.cpp:7: error: `endl' undeclared (first use this function)