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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. int TimKiem ( char s[], int giatri)
  5. {
  6. 	int i;
  7. 	for ( i = 0; i < strlen(s)  ; i++)
  8. 	{
  9. 		if ( s[i] == giatri )
  10.             return i;
  11. 	}
  12. 	return -1;
  13. }
  14.  
  15. int main()
  16. {
  17. 	char a[256] =  { 0 };
  18. 	int b[256] = { 0 };
  19. 	int nab = 0, i, j;
  20. 	char s[51] = "";
  21.  
  22.     fflush(stdin);
  23.     gets(s);
  24.  
  25. 	for ( i = 0; i < strlen(s); i++)
  26. 	{
  27. 		int giatri = s[i];
  28.  
  29. 		int vitri = TimKiem ( s, giatri);
  30.  
  31. 		if ( vitri < 0)
  32.             continue;
  33.         else if ( vitri == i)
  34.              {
  35.                 a[nab] = giatri;
  36.                 b[nab] = 1;
  37.                 nab++;
  38.              }
  39.         else
  40.             b[vitri]++;
  41. 	}
  42.  
  43.     for ( i = 0; i < nab - 1; i++)
  44.         for ( j = i + 1 ; j < nab; j++)
  45.             if ( b[i] < b[j])
  46.             {
  47.                 int tam1 = b[i];
  48.                 b[i] = b[j];
  49.                 b[j] = tam1;
  50.  
  51.                 char tam2 = a[i];
  52.                 a[i] = a[j];
  53.                 a[j] = tam2;
  54.             }
  55.  
  56.     for ( i = 0; i < nab; i++)
  57.         printf("%c xuat hien %d lan \n", a[i], b[i]);
  58.  
  59.     return 0;
  60.  
  61. }
Success #stdin #stdout 0s 10320KB
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https://ideone.com/8r73Q8
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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