📄 velxa.htm

📁 简单的说明如何使用VB,非常适合初学使用者,而且是用图表来解说的
💻 HTM
字号:
<HTML><HEAD><TITLE>Visual Basic in 12 Easy Lessons velxa.htm </TITLE><LINK REL="ToC" HREF="index.htm"><LINK REL="Index" HREF="htindex.htm"><LINK REL="Next" HREF="velxb.htm"><LINK REL="Previous" HREF="velp12.htm"></HEAD><BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#800080"><A NAME="I0"></A><H2>Visual Basic in 12 Easy Lessons velxa.htm</H2><P ALIGN=LEFT><A HREF="velp12.htm" TARGET="_self"><IMG SRC="purprev.gif" WIDTH = 32 HEIGHT = 32 BORDER = 0 ALT="Previous Page"></A><A HREF="index.htm" TARGET="_self"><IMG SRC="purtoc.gif" WIDTH = 32 HEIGHT = 32 BORDER = 0 ALT="TOC"></A><A HREF="velxb.htm" TARGET="_self"><IMG SRC="purnext.gif" WIDTH = 32 HEIGHT = 32 BORDER = 0 ALT="Next Page"></A><HR ALIGN=CENTER><P><HR ALIGN=CENTER><A NAME="E66E37"></A><H1 ALIGN=CENTER><CENTER><FONT SIZE=6 COLOR="#FF0000"><B>Appendix A</B></FONT></CENTER></H1><BR><A NAME="E67E40"></A><H2 ALIGN=CENTER><CENTER><FONT SIZE=6 COLOR="#FF0000"><B>Operator Precedence</B></FONT></CENTER></H2><BR><P>There are three sets of operators, arithmetic, comparison, and logical operators. This appendix's three tables describe each operator set's order of precedence.<BR><BR><P ALIGN=CENTER><CENTER><FONT COLOR="#000080"><B>Table A.1. The arithmetic operator precedence.</B></FONT></CENTER><BR><TABLE  BORDERCOLOR=#000040 BORDER=1 CELLSPACING=2 WIDTH="100%" CELLPADDING=2 ><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080><I>Level</I></FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080><I>Operator</I></FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>1</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Exponentiation (^)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>2</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Negation (-)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>3</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Multiplication and division (*, /)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>4</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>In<A NAME="I2"></A>teger division (\)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>5</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Modulo division (Mod)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>6</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Addition and subtraction (+, -)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>7</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>String concatenation (&amp;)</FONT></TABLE><BR><P ALIGN=CENTER><CENTER><FONT COLOR="#000080"><B>Table A.2. The comparison precedence.</B></FONT></CENTER><BR><TABLE  BORDERCOLOR=#000040 BORDER=1 CELLSPACING=2 WIDTH="100%" CELLPADDING=2 ><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080><I>Level</I></FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080><I>Operator</I></FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>1</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Equality (=)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>2</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Inequality (&lt;&gt;)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>3</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Less than (&lt;)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>4</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Greater than (&gt;)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>5</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Less than or equal to (&lt;=)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>6</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Greater than or equal to (&gt;=)</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>7</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Like</FONT></TABLE><BR><P ALIGN=CENTER><CENTER><FONT COLOR="#000080"><B>Table A.3. The logical operator precedence.</B></FONT></CENTER><BR><TABLE  BORDERCOLOR=#000040 BORDER=1 CELLSPACING=2 WIDTH="100%" CELLPADDING=2 ><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080><I>Level</I></FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080><I>Operator</I></FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>1</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Not</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>2</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>And</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>3</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Or</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>4</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Xor</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>5</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Eqv</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>6</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Imp</FONT><TR><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>7</FONT><TD VALIGN=top  BGCOLOR=#80FFFF ><FONT COLOR=#000080>Is</FONT></TABLE><P ALIGN=LEFT><A HREF="velp12.htm" TARGET="_self"><IMG SRC="purprev.gif" WIDTH = 32 HEIGHT = 32 BORDER = 0 ALT="Previous Page"></A><A HREF="#I0" TARGET="_self"><IMG SRC="purtop.gif" WIDTH = 32 HEIGHT = 32 BORDER = 0 ALT="Page Top"></A><A HREF="index.htm" TARGET="_self"><IMG SRC="purtoc.gif" WIDTH = 32 HEIGHT = 32 BORDER = 0 ALT="TOC"></A><A HREF="velxb.htm" TARGET="_self"><IMG SRC="purnext.gif" WIDTH = 32 HEIGHT = 32 BORDER = 0 ALT="Next Page"></A></BODY></HTML>
⌨️ 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 + -