[求助]关于eval的使用问题

dxwwangyan

<P>我在图形界面窗口中定义了四个edit控件，要将其中输入的数据传入pushapply函数中进行运算，pushapply()部分代码如下：<BR>function pushapply(hlineedit1x,hlineedit1y,hlineedit2x,hlineedit2y)<BR>global FileName;<BR>global x1;<BR>global g;<BR>hx=get(hlineedit1x,'string'); %获得输入的字符串函数 &lt;2&gt; <BR>hy=get(hlineedit1y,'string');  <BR>vx=get(hlineedit2x,'string'); <BR>vy=get(hlineedit2y,'string');<BR>string1= 'f1=';<BR>string2=';';<BR>user_entry1=[string1,hx,string2];<BR>eval(user_entry1');<BR>string1= 'g1=';<BR>string2=';';<BR>user_entry2=[string1,hy,string2];<BR>eval(user_entry2');<BR>string1= 'f2=';<BR>string2=';';<BR>user_entry3=[string1,vx,string2];<BR>eval(user_entry3');<BR>string1= 'g2=';<BR>string2=';';<BR>user_entry4=[string1,vy,string2];<BR>eval(user_entry4');<BR>......<BR>可是运行时出现下面的错误：<BR>??? Error: Incomplete or misformed expression or statement.</P>
<P>Error in ==&gt; pushapply at 16<BR>eval(user_entry2');</P>
<P>??? Error while evaluating uicontrol Callback.</P>
<P>??? Error: Incomplete or misformed expression or statement.</P>
<P>Error in ==&gt; pushapply at 20<BR>eval(user_entry3');</P>
<P>??? Error while evaluating uicontrol Callback.</P>
<P>??? Error: Incomplete or misformed expression or statement.</P>
<P>Error in ==&gt; pushapply at 24<BR>eval(user_entry4');</P>
<P>??? Error while evaluating uicontrol Callback.<BR><BR>请问这是什么问题，谢谢指教！</P>

happy

去掉string2

twb0624

看不懂啊，水平太低啊。郁闷了。我也需要用这个函数啊。

ChaChing

1F
我在图形界面窗口中定义了四个edit控件，要将其中输入的数据传入pushapply函数中进行运算，pushapply()部分代码如下：

1. function pushapply(hlineedit1x,hlineedit1y,hlineedit2x,hlineedit2y)
   
2. global FileName;
   
3. global x1;
   
4. global g;
   
5. hx=get(hlineedit1x,'string'); %获得输入的字符串函数 <2>
   
6. hy=get(hlineedit1y,'string');
   
7. vx=get(hlineedit2x,'string');
   
8. vy=get(hlineedit2y,'string');
   
9. string1= 'f1=';
   
10. string2=';';
    
11. user_entry1=[string1,hx,string2];
    
12. eval(user_entry1');
    
13. string1= 'g1=';
    
14. string2=';';
    
15. user_entry2=[string1,hy,string2];
    
16. eval(user_entry2');
    
17. string1= 'f2=';
    
18. string2=';';
    
19. user_entry3=[string1,vx,string2];
    
20. eval(user_entry3');
    
21. string1= 'g2=';
    
22. string2=';';
    
23. user_entry4=[string1,vy,string2];
    
24. eval(user_entry4');
    
25. ......

复制代码

可是运行时出现下面的错误：
??? Error: Incomplete or misformed expression or statement.

Error in ==> pushapply at 16
eval(user_entry2');

??? Error while evaluating uicontrol Callback.

??? Error: Incomplete or misformed expression or statement.

Error in ==> pushapply at 20
eval(user_entry3');

??? Error while evaluating uicontrol Callback.

??? Error: Incomplete or misformed expression or statement.

Error in ==> pushapply at 24
eval(user_entry4');

??? Error while evaluating uicontrol Callback.

请问这是什么问题，谢谢指教！