⭐ 欢迎来到虫虫下载站！ | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站
📤 上传资源

📄 csdn_文档中心_关注内存 提高软件性能.htm

📁 csdn10年中间经典帖子
💻 HTM
📖 第 1 页 / 共 4 页
字号:
🔍
1234 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN></SPAN><SPAN lang=EN-US 
            style="COLOR: blue; FONT-SIZE: 12pt; mso-font-kerning: 0pt">void</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">* 
            _p;<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">};<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: blue; FONT-SIZE: 12pt; mso-font-kerning: 0pt">class</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"> A 
            <o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">{<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: blue; FONT-SIZE: 12pt; mso-font-kerning: 0pt">public</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">:<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN>A(){ cout&lt;&lt;</SPAN><SPAN lang=EN-US 
            style="COLOR: #000077; FONT-SIZE: 12pt; mso-font-kerning: 0pt">"Ctor();"</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">;<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN>}<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN><o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">};<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: blue; FONT-SIZE: 12pt; mso-font-kerning: 0pt">void</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"> 
            main()<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">{<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN>A* pointer = </SPAN><SPAN lang=EN-US 
            style="COLOR: blue; FONT-SIZE: 12pt; mso-font-kerning: 0pt">new</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"> 
            A;<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN><o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN>smpPointer ptr(pointer);<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN><o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">}<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">上面这种实现看起来总是有点不自然</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">,</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">调用</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">new</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">之后必须在栈上分配一个</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">smppointer</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">对象</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">.</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">当程序退出的时候</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">(</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">或者函数运行完毕时候</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">),</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">栈上的对象会销毁</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">,</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">这样就可以自动调用</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">smppointer</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">的析够函数</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">,</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">从而释放内存了</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">.<o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">我们再看下面的版本</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">.</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">基本思路是这样的</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">:</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">用一个链表把每次对象分配的时候分配在何处的位置记下来</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">,</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">放在一个链表中</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">.</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">最后统一回收</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">.</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">实现这种思路的时候</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">,</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">必须为每</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">1</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">个需要改特性的类重载</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">new,delete</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">操作符</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">.</SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">也不是很好</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; FONT-SIZE: 12pt; mso-font-kerning: 0pt">. 
            <o:p></o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: blue; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><o:p>&nbsp;</o:p></SPAN></P>
            <P align=left class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN 
            lang=EN-US 
            style="COLOR: blue; FONT-SIZE: 12pt; mso-font-kerning: 0pt"><o:p>&nbsp;</o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">版本</SPAN><SPAN 
            lang=EN-US 
            style="mso-font-kerning: 0pt">2<o:p></o:p></SPAN></FONT></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="mso-font-kerning: 0pt"><o:p><FONT 
            size=3>&nbsp;</FONT></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="mso-font-kerning: 0pt"><FONT size=3>#include&lt;<SPAN 
            style="COLOR: black">iostream&gt;<o:p></o:p></SPAN></FONT></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="mso-font-kerning: 0pt"><FONT size=3>#include <SPAN 
            style="COLOR: black">&lt;list&gt;<o:p></o:p></SPAN></FONT></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="mso-font-kerning: 0pt"><FONT size=3>using<SPAN 
            style="COLOR: black"> </SPAN>namespace<SPAN style="COLOR: black"> 
            </SPAN>std<SPAN 
            style="COLOR: black">;<o:p></o:p></SPAN></FONT></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="COLOR: black; mso-font-kerning: 0pt"><o:p><FONT 
            size=3>&nbsp;</FONT></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="COLOR: black; mso-font-kerning: 0pt"><o:p><FONT 
            size=3>&nbsp;</FONT></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN 
            lang=EN-US 
            style="COLOR: black; mso-font-kerning: 0pt">list&lt;</SPAN><SPAN 
            lang=EN-US style="mso-font-kerning: 0pt">void<SPAN 
            style="COLOR: black">*&gt; memlist;//</SPAN></SPAN><SPAN 
            style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 0pt">分配内存块的指针所链接成的双向链表</SPAN><SPAN 
            lang=EN-US 
            style="COLOR: black; mso-font-kerning: 0pt"><o:p></o:p></SPAN></FONT></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="COLOR: black; mso-font-kerning: 0pt"><o:p><FONT 
            size=3>&nbsp;</FONT></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="mso-font-kerning: 0pt"><FONT size=3>class<SPAN 
            style="COLOR: black"> A <o:p></o:p></SPAN></FONT></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="COLOR: black; mso-font-kerning: 0pt"><FONT 
            size=3>{<o:p></o:p></FONT></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US 
            style="mso-font-kerning: 0pt"><FONT size=3>public<SPAN 
            style="COLOR: black">:<o:p></o:p></SPAN></FONT></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN 
            lang=EN-US style="COLOR: black; mso-font-kerning: 0pt"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </SPAN>A() { cout&lt;&lt;</SPAN><SPAN lang=EN-US 
            style="COLOR: #000077; mso-font-kerning: 0pt">"ctor A\n"</SPAN><SPAN 
            lang=EN-US
1234

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -