Question

I tried to pass const with vector it works:
Ex:

void damn(const vector <bool> &bb)
{
    for (int i=0; i<bb.size(); i++)
        cout<<bb[i]<<endl;

}

But when trying with map, it does not:

void pas(const map <string, float> &mm)
{
    cout<<mm["a"];
    cout<<mm["b"];
}

I wonder why it doesn’t.

Answer 1

I believe that it is because [] in map isn’t const, as it creates new pair with default value, if you address to nonexisting one. Try

void pas(const map <string, float> &mm)
{
    cout<<mm.find("a")->second;
    cout<<mm.find("b")->second;
}