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Ch9内存模型和名称空间/名称空间/namesp.h

+//namesp.h
+#include <string>
+
+//create the pers and debts namespaces
+
+namespace pers
+{
+	struct Person
+	{
+		std::string fname;
+		std::string lname;
+	};
+	void getPerson(Person&);
+	void showPerson(const Person&);
+}
+
+namespace debts
+{
+	using namespace pers;
+	struct Debt
+	{
+		Person name;
+		double amount;
+	};
+	void getDebt(Debt&);
+	void showDebt(const Debt&);
+	double sumDebts(const Debt arr[], int n);
+}
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