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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. char vowels[] = {'a','e','i','o','u','A','E','I','O','U'};
  6.  
  7. int linear_search(char chr, char* str, size_t len)
  8. {
  9.     int i;
  10.     for (i = 0; i < len; ++i)
  11.     {
  12.         if (str[i] == chr)
  13.         {
  14.             return i;
  15.         }
  16.     }
  17.     return -1;
  18. }
  19.  
  20. int in(char chr, char* str, size_t len)
  21. {
  22.     return linear_search(chr, str, len) == -1 ? 0 : 1;
  23. }
  24.  
  25. int is_a_vowel(char chr)
  26. {
  27.     return in(chr, vowels, sizeof(vowels));
  28. }
  29.  
  30. void remove_vowels(char* str, size_t len)
  31. {
  32.     char* buf = malloc(sizeof(*buf)*len);
  33.     int i, j=0;
  34.     for (i = 0; i < len; ++i)
  35.     {
  36.         if (!is_a_vowel(str[i]))
  37.         {
  38.             buf[j] = str[i];
  39.             ++j;
  40.         }
  41.     }
  42.     memcpy(str,buf,sizeof(*str)*j);
  43.     free(buf);
  44. }
  45.  
  46. int main(int argc, char *argv[])
  47. {
  48.     char str[] = "Green Eggs and Ham";
  49.     printf("%s\n", str);
  50.     remove_vowels(str, sizeof(str));
  51.     printf("%s\n", str);
  52.     return 0;
  53. }
Success #stdin #stdout 0.01s 1808KB
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Green Eggs and Ham
Grn ggs nd Hm
https://ideone.com/6xFV2
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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