获取部件中所有的表达式，并对表达式进行更改，更新模型

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获取部件中所有的表达式，并对表达式进行更改，更新模型
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结果：
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  Z3 V2 K! T" bBefore change the value :
% v9 j7 j' b4 b2 J5 j6 Op0=20
p1=h
  x/ e" z) \: A$ Y; ~- ?w=100
3 O, G2 R4 U$ p; y* p2 s" |* M1 \h=20
l=200
Start to change the expressions :
p0=20
4 S+ ^, ~4 D3 L- Ip1=h
3 A6 u- C2 x% lw=100
4 C5 \) S# T3 B3 R/ ^* O( M8 P! J5 Nh=20
l=200
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1. <p>
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2. static void do_UGopen_api(void)
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3. {
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4. // create block 1
   
5. double coner[3] = {0,0,0};
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6. char *edges[3] = {"l=100","w=100","h=20"};
   
7. tag_t blk_tag;
   
8. UF_MODL_create_block1(UF_NULLSIGN,coner,edges,&blk_tag);
   
9. // create a hole
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10. double dir[3] = {0,0,1};
    
11. double coner1[3] = {50,50,0};
    
12. tag_t cyl_tag;
    
13. UF_MODL_create_cyl1(UF_NEGATIVE,coner1,"h","20",dir,&cyl_tag);</p><p> // get the expressions
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14. tag_t part=UF_PART_ask_display_part();
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15. int number_of_exps = 0;
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16. tag_t *exps;
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17. char *str;
    
18. char expStr[133];
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19. UF_UI_open_listing_window();
    
20. UF_MODL_ask_exps_of_part(part,&number_of_exps,&exps);
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21. UF_UI_write_listing_window("Before change the value : \n");
    
22. for(int i = 0 ; i < number_of_exps;i++)
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23. {
    
24.       
    
25.    UF_MODL_ask_exp_tag_string(exps[i],&str);
    
26.    UF_UI_write_listing_window(str);
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27.    UF_UI_write_listing_window("\n");
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28.    UF_free(str);
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29. }
    
30. 
    
31. UF_free(exps);
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32. //Start to change the expressions
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33. UF_UI_write_listing_window("Start to change the expressions : \n");
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34. char *exp_str = "l = 200";
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35. UF_MODL_edit_exp(exp_str);
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36. UF_MODL_update();
    
37. exp_str = "\0";
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38. //get the new exps
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39. UF_MODL_ask_exps_of_part(part,&number_of_exps,&exps);
    
40. for(int i = 0 ; i < number_of_exps;i++)
    
41. {
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42.    UF_MODL_ask_exp_tag_string(exps[i],&str);
    
43.    UF_UI_write_listing_window(str);
    
44.    UF_UI_write_listing_window("\n");
    
45.    UF_free(str);
    
46. }
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47. UF_free(exps);
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48. }</p><p> </p>

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