prog.cpp: In function ‘int main()’:
prog.cpp:4:2: error: ‘vector’ was not declared in this scope
vector<int> v = {1, 2, 3};
^~~~~~
prog.cpp:4:2: note: suggested alternative:
In file included from /usr/include/c++/6/vector:64:0,
from prog.cpp:1:
/usr/include/c++/6/bits/stl_vector.h:214:11: note: ‘std::vector’
class vector : protected _Vector_base<_Tp, _Alloc>
^~~~~~
prog.cpp:4:9: error: expected primary-expression before ‘int’
vector<int> v = {1, 2, 3};
^~~