View Compilation Error

320535_0_21862.cpp: In function `int main()':
320535_0_21862.cpp:5: error: `cin' undeclared (first use this function)
320535_0_21862.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
320535_0_21862.cpp:13: error: `cout' undeclared (first use this function)
320535_0_21862.cpp:13: error: `endl' undeclared (first use this function)
320535_0_21862.cpp: At global scope:
320535_0_21862.cpp:16: error: expected unqualified-id before "return"
320535_0_21862.cpp:16: error: expected `,' or `;' before "return"