View Compilation Error

648666_0_0_13940.cpp: In function `int main()':
648666_0_0_13940.cpp:9: error: `cin' undeclared (first use this function)
648666_0_0_13940.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
648666_0_0_13940.cpp:11: error: `cout' undeclared (first use this function)
648666_0_0_13940.cpp:11: error: `endl' undeclared (first use this function)