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  1. #include <stdio.h>
  2. // INPUT:  abcd    a       abcdef  a
  3. // OUTPUT: abcd****a******abcdef*a                                                             [
  4. // OUTPUT: ---Detab: abcd****ba*****abcdef*<a
  5. #define MAXLINE 1000
  6.  
  7. void detab (char s [], int tabwidth, int lim);
  8. int main ()
  9. {
  10. 	int i, c, max;
  11. 	max = MAXLINE;
  12. 	char input [MAXLINE];
  13. 	for (i = 0; i < max && (c = getchar ()) != EOF; ++i)
  14. 	{
  15. 		input [i] = c;
  16. 	}
  17. 	detab (input, 8, max);
  18. 	printf ("\n---Detab: %s...\n", input);
  19. 	return 0;
  20. }
  21.  
  22. // lim must be larger than true size to allow for conversion and extra chars
  23. void detab (char s [], int tabwidth, int lim)
  24. {
  25. 	int i; 
  26. 	int j = 0;
  27. 	char t [lim];
  28. 	for (i = 0; i < lim && s[i-1] != '\0'; ++i)
  29. 	{
  30. 		t[i] = s[i];
  31. 	}
  32. 	t [i] = '\0';
  33. 	// Good through here
  34. 	// t never changes from here out
  35.  
  36.  
  37. 	for (i = 0; t[i] != '\0' && i < lim; ++i)
  38. 	{
  39. 		putchar (t [i]);
  40. 		// Work on this
  41. 		// Problem is that the first tab is always correct
  42. 		// remaining tabs have 1 less '*' than necessary and the next is missing 2. etc.
  43. 		// also returning the string leads to dirty end of string for some reason
  44. 		// as in weird letters appended
  45. 		if (t [i] == '\t')
  46. 		{
  47. 			while ((j % tabwidth) != 0)
  48. 			{
  49. 				s [j] = '*';
  50. 				//putchar (s[j]);
  51. 				++j;
  52. 			}
  53. 			//i++ maybe
  54. 			--j;
  55. 		}
  56.  
  57. 		else
  58. 		{
  59. 			s[j] = t[i];
  60. 			//putchar (s[j]);
  61. 		}
  62. 		++j;
  63. 	}
  64. 	// last char of s is null
  65. 	s [j+1] = '\0';
  66. }
Success #stdin #stdout 0.01s 5284KB
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stdin
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ABCD\t
stdout
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---Detab: A...
https://ideone.com/OVpmxT
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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