Question related to std::map usage

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C++

Hello Everyone,

I am checking the usage of std::map and I would like to share you if there is a better approach to cover the version to link to different map part of my code segment I post bellow.

Could somebody explain me the best approach for such a map usage ?

Thank you very much in advance.

<pre>#include <iostream>
#include <cstdlib>
#include <memory>
#include <map>

using namespace std;

class InputScale
{
public:
    float offset;
    float factor;
};

int main()
{
    bool inputSelected = true;
    map<int, unique_ptr<InputScale>> inputScales;
    map<int, unique_ptr<InputScale>> tachoScales;   
    
    // version linked to one single map.
    auto& inputScale = inputScales[1];
    inputScale = make_unique<InputScale>();
    
    inputScale->offset = 1.f;
    std::cout << inputScale->offset << std::endl;
    
    // version to link to different map
    map<int, unique_ptr<InputScale>>::mapped_type* scale{ nullptr };
    if (inputSelected)
        scale = &inputScales[2];
    else
        scale = &tachoScales[2];
    
    *scale = make_unique<InputScale>();
    (*scale)->offset = 2.f;
    
    std::cout << (*scale)->offset << std::endl;
}

What I have tried:

Currently I am using a pointer but I would like to get rid of it.