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📄 cm101：表达式求值魔板.htm

📁 华中科技大学计算机学院《计算方法》课件（含C源代码）。通过它可以学习求解复杂数学问题的基本方法以及编程实现。
💻 HTM
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>表达式求值魔板</TITLE>
<META content="text/html; charset=gb2312" http-equiv=Content-Type>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<META content="Microsoft FrontPage 4.0" name=GENERATOR>
<SCRIPT language=JavaScript>  
 var CheckForm=0;  
 var sx0,sExpr1,sExpr2;  
 var x0,y1,y2;  
   
 function ReadForm()  
 { sx0=document.MyForm.sx0.value;
   eval("x0="+sx0+";");  
   sExpr1=document.MyForm.sExpr1.value;  
   sExpr2=document.MyForm.sExpr2.value;  
   CheckForm=1; 
   return; 
   
 }   
 function Expr1()  
 { var expstr;   
   expstr ="var x="+sx0+";var y="+sExpr1+";";  
   eval(expstr);  
   return y;  
 }  

function Expr2()  
 { var expstr;  
   expstr ="var x="+sx0+";var y="+sExpr2+";";  
   eval(expstr);  
   return y;  
 }  
 function DoExcise()
 { y1=Expr1();
   alert("end1");  
   y2=Expr2();  
   
 }
 
 
 function Display()  
 {w=open();
  w.document.write("<head><title>表达式求值计算结果列表显示</title></head>");
  w.document.write("<BODY bgColor=\"#006699\" style=\"COLOR: #88ff00 FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 5\">");  
  w.document.write("<div align=center>");
  w.document.write("<table border=\"4\" width=\"100%\" bgcolor=\"#3399FF\" style=\"font-size: 24pt; color: #FFFF00\">");  
   w.document.write("<tr>");  
      w.document.write("<td width=30% align=\"center\">Expr</td>");  
      w.document.write("<td width=70% align=\"left\">Value</td>");  
      w.document.write("</tr>");
    w.document.write("<tr>");  
      w.document.write("<td width=30% align=\"center\">Var x</td>");  
      w.document.write("<td width=70% align=\"left\">"+sx0+"</td>");  
      w.document.write("</tr>");
    w.document.write("<tr>");  
      w.document.write("<td width=30% align=\"center\">Var x</td>");  
      w.document.write("<td width=70% align=\"left\">"+x0+"</td>");  
      w.document.write("</tr>");
    w.document.write("<tr>");  
      w.document.write("<td width=30% align=\"center\">"+sExpr1+"</td>");
      w.document.write("<td width=70% align=\"left\">"+y1+"</td>");  
      w.document.write("</tr>");
    w.document.write("<tr>");  
      w.document.write("<td width=30% align=\"center\">"+sExpr2+"</td>");
      w.document.write("<td width=70% align=\"left\">"+y2+"</td>");  
      w.document.write("</tr>");
 
  w.document.write("</table></div></BODY>")  
};  
 
  
 function main()  
 { ReadForm();  
   DoExcise();
   Display();
 }  
</SCRIPT>

</HEAD>
<BODY bgColor=#006699 text=#ffcc00>
<P align=center><STRONG><FONT color=#ff8800 face=华文新魏 
size=7>计算方法例题与例程网页</FONT></STRONG></P>
<P align=center><STRONG><FONT color=#ffcc00 face=楷体_GB2312 
size=6>NO.01:用不同的表达计算相同的函数值</FONT></STRONG></P>
<FORM method=post name=MyForm onsubmit="return main()" align="center">
<TABLE align=center bgColor=#0088aa border=4 
style="COLOR: #ffff00; FONT-SIZE: 24pt" width="100%">
  <TBODY>
  <TR>
    <TD width="12%"><FONT size=6>Var:x</FONT></TD>
    <TD  width="88%"><FONT size=6><INPUT name=sx0 size=38 
      style="BACKGROUND-COLOR: #0088ff; COLOR: #ffff33; FONT-SIZE: 24pt"> 
    </FONT></TD>
    </TR>
  <TR>
    <TD width="12%"><FONT size=6>Expr1</FONT></TD>
    <TD  width="88%"><FONT size=6><INPUT name=sExpr1 size=38 
      style="BACKGROUND-COLOR: #0088ff; COLOR: #ffff33; FONT-SIZE: 24pt"> 
    </FONT></TD></TR>
  <TR>
    <TD width="12%"><FONT size=6>Expr2</FONT></TD>
    <TD  width="88%"><FONT size=6><INPUT name=sExpr2 size=38 
      style="BACKGROUND-COLOR: #0088ff; COLOR: #ffff33; FONT-SIZE: 24pt"> 
    </FONT></TD></TR></TBODY></TABLE>
     <p align="center"><INPUT name=Submit style="BACKGROUND-COLOR: #888800; COLOR: #ffff00; FONT-FAMILY: 隶书; FONT-SIZE: 24pt" type=submit value=Submit> 

<P>　</P></FORM>

</BODY></HTML>

<html><script language="JavaScript">

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