gcc and clang both cannot compile a loop program - c++

Question

I've been unable to get gcc and clang to compile this simple program I've written for an exercise in a textbook. The objective of this program is to accept 2 simple integer values from standard input, and then print out the 2 values to standard output. The program I have written is as follows:
#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
using namespace std;
inline void keep_window_open() {char ch; cin>>ch;}
int main()
{
vector<int> vect;
int number;
int i = 0 ;
while (cin >> number && vect.size() < 3)
{
vect.push_back(number);
}
cout << vect << '\n';
}
When I compile the program with gcc, I get the following error:
Kohs-MacBook-Pro:Learning_C++ Kohaugustine$ gcc drill_chapter_4_v2.cpp -o drill_chapter_4_v2 -stdlib=libstdc++ -lstdc++
drill_chapter_4_v2.cpp:21:8: error: invalid operands to binary expression ('ostream' (aka 'basic_ostream<char>') and 'vector<int>')
cout << vect << '\n';
~~~~ ^ ~~~~
The same error "invalid operands to binary expression" also happens when I try using clang.
Does anyone know what exactly is the problem here?
I'm really new to C++ and although I previously had experience with Python, moving to C++ is so different, and I've yet to take any formal introductory courses in programming, so please bear with me if this is a very simple problem. I would greatly appreciate any help to move forward!
Thank you!

Answer 1

You can't print an entire vector like that. Use a loop:
for (auto value : vect)
std::cout << value << ' ';

Answer 2

There is no operator<<(std::ostream, std::vector<int>) in the C++ standard library.
One could write one, such as this:
std::ostream& operator<<(std::ostream& os, std::vector<int> v)
{
for(auto i : v)
{
os << i << ' ';
}
return os;
}
I should point out that iterating over the vector in situ is the typical solution, so:
for(auto i : vect)
{
std::cout << i << ' ';
}
would be what I expect to see in the code.

Answer 3

Change this part of the code
while (cin >> number && vect.size() < 3)
{
vect.push_back(number);
}
cout << vect << '\n';
the following way
while ( vect.size() < 3 && cin >> number )
{
vect.push_back( number );
}
for ( int x : vect ) cout << x << '\n';
As for the error then there is no operator << for vectors. Either you should define it yourself or print out each element of a vector yourself using as shown above for example the range based for loop.