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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. int compare(const void* a1, const void* a2)
  6. {
  7.     const char** s1   = a1;
  8.     const char** s2   = a2;
  9.     const int result = strcmp(*s1, *s2); 
  10.     return result;
  11. }
  12.  
  13. int main()
  14. {
  15.     char* s[] = { "e", "d", "c", "b", "a" };
  16.     const size_t s_element_size  = sizeof(s[0]);
  17.     const size_t s_element_count = sizeof(s) / s_element_size;
  18.     size_t i;
  19.  
  20.     for (i = 0; i < s_element_count; i++)
  21.     {
  22.         printf("[%s]\n", s[i]);
  23.     }
  24.     printf("\n");
  25.  
  26.     qsort(s, s_element_count, s_element_size, compare);
  27.  
  28.     for (i = 0; i < s_element_count; i++)
  29.     {
  30.         printf("[%s]\n", s[i]);
  31.     }
  32.  
  33.     return 0;
  34. }
  35.  
Success #stdin #stdout 0.01s 1676KB
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stdin
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Standard input is empty
stdout
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[e]
[d]
[c]
[b]
[a]

[a]
[b]
[c]
[d]
[e]
https://ideone.com/rUG89
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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