prog.cpp:6:3: error: no member named 'push_pack' in 'std::vector<int, std::allocator<int> >'
v.push_pack(x);
~ ^
prog.cpp:6:13: error: use of undeclared identifier 'x'
v.push_pack(x);
^
prog.cpp:7:6: error: use of undeclared identifier 'x'
cin>>x;
^
3 errors generated.