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<%!
public int getFactorial(int n)
{
if (n == 1||n == 0)
return 1;
else
return n * getFactorial(n - 1);
}
void main()
{
int sum=0;
for(int i=1;i <=n;i++)
  {
    sum+=getFactorial(i);
  }
}
%>
<%
    int num = 0;
    String str = request.getParameter("num");
    if (str!=null)
    num = Integer.parseInt(str);
%>
<body>
<form action="" method="post">
<input type="text" name="num">
<input type="submit" value="¼ÆËã">
</form>
<%=getFactorial(num) %>
</body>
</html>
  ÕâÊÇÎÒ×Ô¼ºÐ´µÄ µ«ÊDz»ÄÜÊä³ö¼Ó·¨¹ýºóµÄ½á¹û Ö»Òª½×³ËµÄ½á¹û Ó¦¸ÃÔõôÐ޸ģ¿
void main()
{
int sum=0;
for(int i=1;i <=n;i++)
  {
    sum+=getFactorial(i);
  }
}

¸Ä³É
Java code:


public int getResult()
{
int sum=0;
for(int i=1;i <=n;i++)
{
sum+=getFactorial(i);
}

return sum;
}





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