c++

Please

i need the code for c++ please

last part

void P3 SORT(string); 1/ example usage: b.P3 SORT (com); I/ if com is "FIRST", sort in alphabetical order based on first names; l/ if com is "LAST", sort in alphabetical order based on last names; /l returns no values; protected: string firstNames [20]; string lastNames [20]; ji P3 BANK: :P3 BANK(int x) : P2 BANK( x)// call base class constructor; DO NOT put semicolon at the end of this line \{ int i; 1.f 2. open("customerNames.txt", ios::in); /1 open input file; for (i=0;i apn Lout\# aploUT\# 1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/ : (31/(0) NOI 10356923/1 void P3 SORT (string); Il example usage: b.P3 SORT (com); II if com is "FIRST", sort in alphabetical order based on first names; II if com is "LAST", sort in alphabetical order based on last nanes; I/ returns no values; protected: string firstNames [20]; string lastNames[20]; fi P3 BANK::P3 BANK(int x) : P2 BANK(x) // call base class constructor; DO NOT put semicolon at the end of this line \{ int 1; 1_f_2.open("customerNames.txt", ios::in); /1 open input file; for (i=0;i apn Lout\# aploUT\# 1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/1/ : (31/(0) NOI 10356923/1 void P3 SORT (string); Il example usage: b.P3 SORT (com); II if com is "FIRST", sort in alphabetical order based on first names; II if com is "LAST", sort in alphabetical order based on last nanes; I/ returns no values; protected: string firstNames [20]; string lastNames[20]; fi P3 BANK::P3 BANK(int x) : P2 BANK(x) // call base class constructor; DO NOT put semicolon at the end of this line \{ int 1; 1_f_2.open("customerNames.txt", ios::in); /1 open input file; for (i=0;i<><><>