Pointers and references in C++: what happens with no pointers and no references.

pointers_and_references_no_p_no_r.cpp

#include <iostream>
using namespace std;

int main() {
    int a = 1;
    int b = a;
    cout << "b gets the value that is inside a\n";
    cout << "a=" << a << ", b=" << b << endl; 
    // prints: a=1, b=1
  
    a = 3;
    cout << "changing a does not change anything else\n";
    cout << "a=" << a << ", b=" << b << endl;  
    // prints: a=3, b=1
}