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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+ n* r/ |/ j* ]Before change the value :
p0=20
p1=h
w=100
h=20
) r# h+ c# @( g+ a3 a* P; E# j* wl=200
0 s8 P% r5 X4 `8 B7 c) y  lStart to change the expressions :
7 Y! {5 ~  c" N$ w3 p+ J/ s! ip0=20
" W0 |8 T  s7 K& Q9 X- n. {p1=h
8 |1 d- `3 c0 N* {$ _' ow=100
# E' ]+ n  i/ z" i8 D7 @h=20
l=200
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1. <p>
   
2. static void do_UGopen_api(void)
   
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};
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11. double coner1[3] = {50,50,0};
    
12. tag_t cyl_tag;
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13. UF_MODL_create_cyl1(UF_NEGATIVE,coner1,"h","20",dir,&cyl_tag);</p><p> // get the expressions
    
14. tag_t part=UF_PART_ask_display_part();
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15. int number_of_exps = 0;
    
16. tag_t *exps;
    
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);
    
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. 
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31. UF_free(exps);
    
32. //Start to change the expressions
    
33. UF_UI_write_listing_window("Start to change the expressions : \n");
    
34. char *exp_str = "l = 200";
    
35. UF_MODL_edit_exp(exp_str);
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36. UF_MODL_update();
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37. exp_str = "\0";
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38. //get the new exps
    
39. UF_MODL_ask_exps_of_part(part,&number_of_exps,&exps);
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40. for(int i = 0 ; i < number_of_exps;i++)
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41. {
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42.    UF_MODL_ask_exp_tag_string(exps[i],&str);
    
43.    UF_UI_write_listing_window(str);
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44.    UF_UI_write_listing_window("\n");
    
45.    UF_free(str);
    
46. }
    
47. UF_free(exps);
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48. }</p><p> </p>

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