1 #pragma once 2 #include <string> 3  4 namespace pers 5 { 6     using namespace std; 7     struct Person 8     { 9         string fname;10         string lname;11     };12     void getPerson(Person &);13     void showPerson(const Person &);14 }15 16 namespace debts17 {18     using namespace pers;19     struct  Debt20     {21         Person name;22         double amount;23     };24     void getDebt(Debt &);25     void showDebt(const Debt &);26     double sumDebts(const Debt ar[], int n);27 }

 1 #include "namesp.h" 2 #include <iostream> 3  4 using namespace std; 5  6 void pers::getPerson(Person & rp) 7 { 8     cout << "Enter first name: "; 9     cin >> rp.fname;10     cout << "Enter last name: ";11     cin >> rp.lname;12 }13 14 void pers::showPerson(const Person & rp)15 {16     cout << rp.fname << ", " << rp.lname;17 }18 19 void debts::getDebt(Debt & rd)20 {21     getPerson(rd.name);22     cout << "Enter debt: ";23     cin >> rd.amount;24 }25 26 void debts::showDebt(const Debt & rd)27 {28     showPerson(rd.name);29     cout << ": $" << rd.amount << endl;30 }31 32 double debts::sumDebts(const Debt ar[], int n)33 {34     double total = 0;35     for (int i = 0; i < n; i++)36     {37         total += ar[i].amount;38     }39     return total;40 }

 1 #include <iostream> 2 #include "namesp.h" 3  4 void other(void); 5 void another(void); 6  7 int main() 8 { 9     using debts::Debt;10     using debts::showDebt;11 12     Debt golf = { {"Benny","Goatsniff"},120.0 };13     showDebt(golf);14     other();15     another();16     17     std::cin.get();18     return 0;19 }20 21 void other(void)22 {23     using namespace std;24     using namespace debts;25 26     Person dg = { "Doodles","Glister" };27     showPerson(dg);28     cout << endl;29 30     Debt zippy[3];31     int i;32     for (int i = 0; i < 3; i++)33     {34         getDebt(zippy[i]);35     }36     for (i = 0; i < 3; i++)37     {38         showDebt(zippy[i]);39     }40     cout << "Total debt: $" << sumDebts(zippy, 3) << endl;41     return;42 }43 44 void another(void)45 {46     using pers::Person;47     Person collector = { "Milo","Rightshift" };48     pers::showPerson(collector);49     std::cout << std::endl;50 }