Problem.h

#include <iostream>
#include <fstream>
#include <string>

#include "Mathematic.h"

typedef double Type

const int NUM_VAR = 20;

struct Variable
{
    Type value;
    bool flag;
};

class Problem 
{
private:
    Variable vars[NUM_VAR];
    
    Variable & miu_s = vars[0];
    Variable & miu_t = vars[1];
    // ........
    
public:
    Problem()
    {
        miu_s = NumG("Something here");
        // .......
    }
    
    
}