Do the calculator C++. Simple addition and subtraction, multiplication and division, and trigonometric functions

ebookShop
.........\.classpath
.........\.mymetadata
.........\.project
.........\.settings
.........\.........\com.genuitec.eclipse.core.prefs
.........\src
.........\...\ebookshop
.........\...\.........\bean
.........\...\.........\....\BookBean.java
.........\...\.........\....\CustomerBean.java
.........\...\.........\....\OrderBean.java
.........\...\.........\....\OrderListBean.java
.........\...\.........\common
.........\...\.........\......\DataConnect.java
.........\...\.........\servlet
.........\...\.........\.......\ConnectionCustomer.java
.........\...\.........\.......\LoggingServlet.java
.........\...\.........\.......\NotBuyServlet.java
.........\...\.........\.......\OrderServlet.java
.........\...\.........\.......\QueryServlet.java
.........\...\.........\.......\RegisterDB.java
.........\...\.........\.......\RegisterServlet.java
.........\...\.........\.......\ShoppingCartServlet.java
.........\...\.........\shopcart
.........\...\.........\........\BookDetails.java
.........\...\.........\........\ShopCartItem.java
.........\...\.........\........\ShoppingCart.java
.........\...\sample
.........\...\......\BidName.java
.........\...\......\BookDisplayServlet.java
.........\...\......\BookListDB.java
.........\...\......\BookListServlet.java
.........\...\......\BookServlet.java
.........\...\......\CounterServlet.java
.........\...\......\Logging.java
.........\...\......\Product.java
.........\...\......\ShoppingCart1.java
.........\WebRoot
.........\.......\browse.jsp
.........\.......\logbg.jpg
.........\.......\logging.jsp
.........\.......\login.jsp
.........\.......\META-INF
.........\.......\........\MANIFEST.MF
.........\.......\order.jsp
.........\.......\orderResult.jsp
.........\.......\querybook.jsp
.........\.......\queryorderResult.jsp
.........\.......\register.jsp
.........\.......\showcart.jsp
.........\.......\WEB-INF
.........\.......\.......\c-1_0-rt.tld
.........\.......\.......\c-1_0.tld
.........\.......\.......\c.tld
.........\.......\.......\classes
.........\.......\.......\.......\ebookshop
.........\.......\.......\.......\.........\bean
.........\.......\.......\.......\.........\....\BookBean.class
.........\.......\.......\.......\.........\....\CustomerBean.class
.........\.......\.......\.......\.........\....\OrderBean.class
.........\.......\.......\.......\.........\....\OrderListBean.class
.........\.......\.......\.......\.........\common
.........\.......\.......\.......\.........\......\DataConnect.class
.........\.......\.......\.......\.........\servlet
.........\.......\.......\.......\.........\.......\ConnectionCustomer.class
.........\.......\.......\.......\.........\.......\LoggingServlet.class
.........\.......\.......\.......\.........\.......\NotBuyServlet.class
.........\.......\.......\.......\.........\.......\OrderServlet.class
.........\.......\.......\.......\.........\.......\QueryServlet.class
.........\.......\.......\.......\.........\.......\RegisterDB.class
.........\.......\.......\.......\.........\.......\RegisterServlet.class
.........\.......\.......\.......\.........\.......\ShoppingCartServlet.class
.........\.......\.......\.......\.........\shopcart
.........\.......\.......\.......\.........\........\BookDetails.class
.........\.......\.......\.......\.........\........\ShopCartItem.class
.........\.......\.......\.......\.........\........\ShoppingCart.class
.........\.......\.......\.......\sample
.........\.......\.......\.......\......\BidName.class
.........\.......\.......\.......\......\BookDisplayServlet.class
.........\.......\.......\.......\......\BookListDB.class
.........\.......\.......\.......\......\BookListServlet.class
.........\.......\.......\.......\......\BookServlet.class
.........\.......\.......\.......\......\CounterServlet.class
.........\.......\.......\.......\......\Logging.class
.........\.......\.......\.......\......\Product.class
.........\.......\.......\.......\......\ShoppingCart1.class
.........\.......\.......\fmt-1_0-rt.tld
.........\.......\.......\fmt-1_0.tld
.........\.......\...

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