#include <map>

struct monster
{
    int Damage;
    int PowerUp;
    int Monster_Strength;
    int hp;
    int lvl;
    int money;
    int defense;
};


using key = std::pair<int,int> ; // dungeon_level,moster_level pair

// or typedef std::pair<int,int> key ; // C++98

std::map< key, monster > look_up =
{
 { { 1, 1 } /* key */, { 23, 2, 5, 8, 19, 7, 9 } /* monster 1,1*/ },
 { { 1, 2 } /* key */, { 5, 7, 15, 2, 8, 15, 6 } /* monster 1,2*/ },
 { { 3, 5 } /* key */, { 1, 3, 11, 9, 17, 6, 1 } /* monster 3,5*/ },
};

#include <iostream>

std::ostream& operator << ( std::ostream& stm, const key& k )
{ return stm << '(' << k.first << ',' << k.second << ')' ; }

std::ostream& operator << ( std::ostream& stm, const monster& m )
{
    return stm << "monster{" << m.Damage << ',' << m.PowerUp << ',' << m.Monster_Strength
                << ',' << m.hp << ',' << m.lvl << ',' << m.money << ',' << m.money << '}' ;
}

int main()
{
    key k = { 1, 2 } ;
    std::cout  << k << '\n' ;

	for( const auto& p : look_up )
	    std::cout << "key: " << p.first << " => data: " << p.second << '\n' ;
}