[UNSOLVED] string variable expected

[whitehat]

when i execute my programme there's a message show off  string variable expected

Code: Pascal  [Select][+][-]

1. program ex;
2. uses wincrt;
3. type
4. tab=array[1..3] of integer;
5. taba=array [1..3] of integer;
6. var
7. a,b,c:integer;
8. t:tab;
9. ta:taba;
10. procedure saisir (var t:tab);
11. begin
12. writeln('t[1]');
13. readln(t[1]);
14. writeln('t[2]');
15. readln(t[2]);
16. writeln('t[3]');
17. readln(t[3]);
18. end;
19. procedure transfert (var ta:taba; t:tab);
20. var
21. a,b,c:integer;
22. begin
23. str(abs(t[1]),a);
24. str(abs(t[2]),b);
25. str(abs(t[3]),c);
26. ta[1]:=length(a);
27. ta[2]:=length(b);
28. ta[3]:=length(c);
29. end;
30. procedure affiche (ta:taba);
31. begin
32. writeln('le nembre de chifre de l''entier num 1 =',ta[1]);
33. writeln('le nembre de chifre de l''entier num 2 =',ta[2]);
34. writeln('le nembre de chifre de l''entier num 3 =',ta[3]);
35. end;
36. begin
37. saisir(t);
38. transfert(ta,t);
39. affiche(ta);
40.  

[rvk]

Is that your complete program? (can't imagine because I'm missing the end)
Is that your exact error message? (I get something else but the problem is the same)

On what line do you get that error message?
Did you check what that function does on that line (str()) ?
Look here: http://www.freepascal.org/docs-html/rtl/system/str.html
The second parameter should be string.

[whitehat]

oh thx u so mutch yeah a,b,c should be a string variable