ADD file via upload

Book.cpp

@@ -0,0 +1,47 @@
+#include "Book.h"
+
+Book::Book(string bookname, Date data, bool bookislead, int times)
+{
+    this->BookName = bookname;
+    this->Data = data;
+    this->BookIsLend = bookislead;
+    this->Times = times;
+}
+
+void Book::ShowInfo()
+{
+    cout << "<<" << this->BookName << ">>" << endl;
+    if (!this->BookIsLend) {
+        cout << "状态:" << "在库" << endl;
+    }
+    else {
+        cout << "状态:" << "借出" << endl;//借出图书输出借出时间
+        cout << "借出时间:" << this->Data.ShowDate() << endl;
+    }
+    cout << "借出次数:" << this->Times << endl;
+    cout << endl;
+}
+
+void Book::Show_LoanTime()
+{
+    cout << "借出时间:" << this->Data.ShowDate() << endl;
+}
+
+void Book::inTurnout()//在借出操作中使用_pstu1替换后，不需要再使用这个函数
+{
+    if (this->BookIsLend == false) {
+        this->BookIsLend = true;
+    }
+}
+
+void Book::outTurnin()
+{
+    if (this->BookIsLend == true) {
+        this->BookIsLend = false;
+    }
+}
+
+void Book::addTimes()
+{
+    this->Times += 1;
+}