📄 c++ builder 程序设计实用教程 - 5_2_1 显示磁盘容量 - 张晋 - 17xie.htm
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<P class=a0><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>Top = 8</SPAN></P>
<P class=a0><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>Width = 265</SPAN></P>
<P class=a0><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>Height = 249</SPAN></P>
<P class=a0><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>end</SPAN></P>
<P class=a0><SPAN lang=EN-US>end</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">添加控件后的窗体如图</SPAN><SPAN
lang=EN-US>5-3</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所示。</SPAN></P>
<P class=a><SPAN lang=EN-US><IMG height=204
src="C++ Builder 程序设计实用教程 - 5_2_1 显示磁盘容量 - 张晋 - 17xie.files/131439bf4a.jpg"
width=237 v:shapes="_x0000_i1025"></SPAN></P>
<P class=MsoCaption><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN
lang=EN-US>5-3<SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">添加控件后的窗体</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本示例程序的作用是获得硬盘上三个驱动器（</SPAN><SPAN
lang=EN-US>C</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US>D</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US>E</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）的可用磁盘空间的信息，所以在程序变量的声明中要定义</SPAN><SPAN
lang=EN-US>3</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字符串变量</SPAN><SPAN
lang=EN-US> temp1</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US>temp2</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US>temp3</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，其中依次存储</SPAN><SPAN
lang=EN-US>C</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US>D</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US>E</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">驱动器的可用磁盘空间，如下所示：</SPAN></P>
<P class=a0><SPAN lang=EN-US>String temp1;</SPAN></P>
<P class=a0><SPAN lang=EN-US>String temp2;</SPAN></P>
<P class=a0><SPAN lang=EN-US>String temp3;</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在程序的设计阶段，用鼠标的左键双击窗体上的空白处，在屏幕上就会弹出一个代码窗口，在其中添加如下所示的代码，用于获得和显示驱动器的信息。</SPAN></P>
<P class=a0><SPAN lang=EN-US>void __fastcall TForm1::FormCreate(TObject
*Sender)</SPAN></P>
<P class=a0><SPAN lang=EN-US>{</SPAN></P>
<P class=a0><SPAN lang=EN-US>temp1=IntToStr(DiskSize(3));</SPAN></P>
<P class=a0><SPAN lang=EN-US>temp1="C</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">驱动器的可用空间：</SPAN><SPAN
lang=EN-US>"+temp1+"Byte"+"\n\n";</SPAN></P>
<P class=a0><SPAN lang=EN-US>temp2=IntToStr(DiskSize(4));</SPAN></P>
<P class=a0><SPAN lang=EN-US>temp2="D</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">驱动器的可用空间：</SPAN><SPAN
lang=EN-US>"+temp2+"Byte"+"\n\n";</SPAN></P>
<P class=a0><SPAN lang=EN-US>temp3=IntToStr(DiskSize(5));</SPAN></P>
<P class=a0><SPAN lang=EN-US>temp3="E</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">驱动器的可用空间：</SPAN><SPAN
lang=EN-US>"+temp3+"Byte"+"\n\n";</SPAN></P>
<P class=a0><SPAN lang=EN-US>//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">获得驱动器信息</SPAN></P>
<P class=a0><SPAN
lang=EN-US>Form1->Memo1->Text=temp1+temp2+temp3;</SPAN></P>
<P class=a0><SPAN lang=EN-US>}</SPAN></P>
<P class=a0><SPAN
lang=EN-US>//----------------------------------------------------------</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">最后，存储文件，按键盘上的功能键【</SPAN><SPAN
lang=EN-US>F9</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">】运行程序，程序的运行结果如图</SPAN><SPAN
lang=EN-US>5-4</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所示。</SPAN></P>
<P class=a><SPAN lang=EN-US><IMG height=204
src="C++ Builder 程序设计实用教程 - 5_2_1 显示磁盘容量 - 张晋 - 17xie.files/0d0976f91c.jpg"
width=237 v:shapes="_x0000_i1026"></SPAN></P>
<P class=MsoCaption><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN
lang=EN-US>5-4<SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序运行结果</SPAN></P>
<P class=MsoNormal><SPAN
lang=EN-US><o:p> </o:p></SPAN></P></DIV></DIV></CENTER>
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