I am wondering about the best way to save on RAM/memory when there are many required arrays (I plan to have many more NPCs and various other arrays with text and items). And I am wondering what I can improve on so far.  #include <iostream>  #include <cstring>  #define NUM_NPC 10       // Number of NPC players  #define DETAILS_HEARTS 0 // Heart Position  #define DETAILS_BDMON  1 // Birthday Month Position  #define DETAILS_BDDAY  2 // Birthday Day Position  #define DETAILS_GENDER 3 // NPC Gender  using namespace std;  class npcPlayers {     public:        int getHearts(int playerID);        int getItem(int playerID, int itemID);        int getBirthdayMonth(int playerID);        int getBirthdayDay(int playerID);        char *getName(int playerID);        npcPlayers();     private:        int npcDetails[NUM_NPC][10];        char npcNames[NUM_NPC][20];        int updateHearts(int PlayerID,int value);  };  npcPlayers::npcPlayers() {     npcNames = {Ace,Amber,Benny,Ethan,Michael,Jay,William,Mia,Chloe,Emily};     npcDetails = {        {0,3,5,0},    // Ace        {0,9,20,1},   // Amber        {0,1,10,0},   // Bennny        {0,12,30,0},  // Ethan        {0,2,17,0},   // Michael        {0,6,10,0},   // Jay        {0,8,9,0},    // William        {0,4,1,1},    // Mia        {0,5,13,1},   // Chloe        {0,8,5,1}     // Emily     };  }  int npcPlayers::getHearts(int playerID) {     return npcDetails[playerID][DETAILS_HEARTS];  }  int npcPlayers::getItem(int playerID, int itemID) {  }  int npcPlayers::getBirthdayDay(int playerID) {     return npcDetails[playerID][DETAILS_BDDAY];  }  int npcPlayers::getBirthdayMonth(int playerID) {     return npcDetails[playerID][DETAILS_BDMON];  }  char *npcPlayers::getName(int playerID) {     return npcNames[playerID];  }  int main() {     npcPlayers npc;     cout << Player 1 Details: << endl;     cout << Name:  << npc.getName(1) << endl;     cout << Hearts:  << npc.getHearts(1) << endl;     cout << Birthday:  << npc.getBirthdayMonth(1) << / << npc.getBirthdayDay(1) << endl;     return 0;  }
Array data-handling with NPC class
c++;beginner