ADD file via upload

jieshu.cpp

@@ -0,0 +1,61 @@
+#include<iostream>
+#include"library.h"
+#include"book.h"
+using std::cout;
+using std::cin;
+using std::endl;
+extern Book booklist[50];
+extern int num;
+void wxy::jieshu()
+{
+	char ch;
+	cin.get(ch);
+	if (num == 0)
+	{
+		cout << "Sorry,there are no books in the library,so borrowing books is not supported." << endl;
+	}
+	else
+	{
+		for (;;)
+		{
+			int g{1};
+			int xv{};
+			cout << "Please input the name of the book" << endl;
+			char name[80];
+			cin.getline(name, 80);
+			cin.clear();
+			for (int i{}; i < num; i++) {
+				if (strcmp(name, booklist[i].Name) == 0) {
+					g = 0;
+					xv = i;
+					break;
+				}
+
+
+			}
+			if (g)
+			{
+				cout << "there is no such book" << endl;
+			}
+			else
+			{
+				if (booklist[xv].amount == 0)
+				{
+					cout << "Sorry,all the books are on loan." << endl;
+				}
+				else
+				{
+					booklist[xv].amount--;
+					wxy::daochu();
+					cout << "Successful borrowing!" << endl;
+				}
+			}
+			cout << "wanna go on? press n to quit,press enter to continue" << endl;
+			cin.get(ch);
+			if (ch == 'n' || ch == 'N')
+			{
+				break;
+			}
+		}
+	}
+}