View Compilation Error

729645_0_0_29007.cpp: In function `int main()':
729645_0_0_29007.cpp:9: error: `cin' undeclared (first use this function)
729645_0_0_29007.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
729645_0_0_29007.cpp:9: error: expected primary-expression before '<' token