diff --git a/201816040221/Ex03_13/Ex03_13.cpp b/201816040221/Ex03_13/Ex03_13.cpp
new file mode 100644
index 0000000..7c2adfb
--- /dev/null
+++ b/201816040221/Ex03_13/Ex03_13.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+//#include
+using namespace std;
+
+#include "Invoice.h" // include definition of class Employee
+
+// function main begins program execution
+int main()
+{
+    string a,b;
+    int x,y;
+    cout<<"请输入相关量";
+    cin>>a;
+    cin>>b;
+    cin>>x;
+    cin>>y;
+    Invoice Invoice1(a,b,x,y);
+
+    cout<<Invoice1.getInvoicePd()<<" "<<Invoice1.getInvoicePN()<<" "<<Invoice1.getInvoiceprice()<<" "<<Invoice1.getInvoicesales()<<" "<<Invoice1.InvoiceAmount(x,y);
+    int sales,price;
+    //cout<<"现在的情况：";
+
+
+
+
+
+}
diff --git a/201816040221/Ex03_13/Invoice.cpp b/201816040221/Ex03_13/Invoice.cpp
new file mode 100644
index 0000000..58ec6ff
--- /dev/null
+++ b/201816040221/Ex03_13/Invoice.cpp
@@ -0,0 +1,61 @@
+// Lab 3: Employee.cpp
+// Employee class member-function definitions.
+#include <iostream>
+#include <iomanip>
+#include <stdexcept>
+#include "Invoice.h"
+using namespace std;
+
+Invoice::Invoice(string PN,string Pd,int sales,int price)//declar the Invoice member
+{
+    setInvoicePN(PN);
+    setInvoicePd(Pd);
+    setInvoicesales(sales);
+    setInvoiceprice(price);
+
+}
+void Invoice::setInvoicePN(string PN)//declar the PN member
+{
+    InvoicePN=PN;
+}
+string Invoice::getInvoicePN()
+{
+    return InvoicePN;
+}
+void Invoice::setInvoicePd(string Pd)//declar the Pd member
+{
+    InvoicePd=Pd;
+}
+string Invoice::getInvoicePd()
+{
+    return InvoicePd;
+}
+void Invoice::setInvoicesales(int sales)//declar the sales memver
+{
+    Invoicesales=sales;
+}
+int Invoice::getInvoicesales()
+{
+    return Invoicesales;
+}
+void Invoice::setInvoiceprice(int price)//declar the price member
+{
+    Invoiceprice=price;
+}
+int Invoice::getInvoiceprice()
+{
+    return Invoiceprice;
+}
+int Invoice::InvoiceAmount(int sales,int price)//declar the InvoiceAmount member
+{
+    if(sales==0||price==0)
+    {
+        InvoiceAmount1=0;
+    }
+    else
+    {
+        InvoiceAmount1=sales*price;
+    }
+
+    return InvoiceAmount1;
+}
diff --git a/201816040221/Ex03_13/Invoice.h b/201816040221/Ex03_13/Invoice.h
new file mode 100644
index 0000000..23a6b8c
--- /dev/null
+++ b/201816040221/Ex03_13/Invoice.h
@@ -0,0 +1,29 @@
+// Lab 3: Employee.h
+// Employee class definition.
+
+#include <string> // program uses C++ standard string class
+using namespace std;
+//#define INVOIE_H
+// Employee class definition
+class Invoice
+{
+public://declar the three public member
+
+    Invoice(string,string,int,int);
+    void setInvoicePN(string);
+    void setInvoicePd(string);
+    void setInvoicesales(int);
+    void setInvoiceprice(int);
+    string getInvoicePN();
+    string getInvoicePd();
+    int getInvoicesales();
+    int getInvoiceprice();
+    int InvoiceAmount(int,int);
+
+private:
+     string InvoicePN;
+     string InvoicePd;
+     int Invoicesales;
+     int Invoiceprice,InvoiceAmount;
+   /
+}; // end class Invoice
diff --git a/201816040221/Ex03_15/Date.cpp b/201816040221/Ex03_15/Date.cpp
new file mode 100644
index 0000000..11c7265
--- /dev/null
+++ b/201816040221/Ex03_15/Date.cpp
@@ -0,0 +1,51 @@
+// Lab 3: Employee.cpp
+// Employee class member-function definitions.
+#include <iostream>
+#include <iomanip>
+#include <stdexcept>
+#include "Date.h"
+using namespace std;
+Date::Date(int month,int day,int year)//declare three date members
+{
+    setDatemonth(month);
+    setDateday(day);
+    setDateyear(year);
+
+}
+void Date::setDatemonth(int month)//declar the month member
+{
+    if(month<1||month>12)
+    {
+        Datemonth=1;
+    }
+    else
+    {
+
+
+    Datemonth=month;
+    }
+}
+int Date::getDatemonth()
+{
+
+    return Datemonth;
+}
+void Date::setDateday(int day)//declar the day member
+{
+
+    Dateday=day;
+}
+int Date::getDateday()
+{
+    return Dateday;
+}
+void Date::setDateyear(int year)
+{
+    Dateyear=year;
+}
+int Date::getDateyear()
+{
+    return Dateyear;
+}
+
+
diff --git a/201816040221/Ex03_15/Date.h b/201816040221/Ex03_15/Date.h
new file mode 100644
index 0000000..f9bfef9
--- /dev/null
+++ b/201816040221/Ex03_15/Date.h
@@ -0,0 +1,29 @@
+// Lab 3: Employee.h
+// Employee class definition.
+
+#include <string> // program uses C++ standard string class
+using namespace std;
+//#define INVOIE_H
+// Employee class definition
+class Date
+{
+public://declar the three public member
+
+    Date(int,int,int);
+    void setDatemonth(int);
+    void setDateday(int);
+    void setDateyear(int);
+
+
+    int getDatemonth();
+    int getDateday();
+    int getDateyear();
+
+
+private:
+     int Datemonth;
+     int Dateday;
+     int Dateyear;
+     int dissplayDate1();
+
+}; // end class date
diff --git a/201816040221/Ex03_15/Ex03_15.cpp b/201816040221/Ex03_15/Ex03_15.cpp
new file mode 100644
index 0000000..5a3b12d
--- /dev/null
+++ b/201816040221/Ex03_15/Ex03_15.cpp
@@ -0,0 +1,29 @@
+// Lab 3: EmployeeTest.cpp
+// Create and manipulate two Employee objects.
+#include <iostream>
+//#include
+using namespace std;
+
+#include "Date.h" // include definition of class Employee
+
+// function main begins program execution
+int main()
+{
+
+    int a,x,y;
+    cout<<"ÇëÊäÈëÏà¹ØÁ¿\n";
+    cin>>a;
+    cin>>x;
+    cin>>y;
+    Date Date1(a,x,y);
+
+    //cout<<Date1.displayDate(a,x,y);
+    int sales,price;
+    cout<<Date1.getDatemonth()<<"/"<<Date1.getDateday()<<"/"<<Date1.getDateyear();
+}
+
+
+
+
+
+