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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4.     int array1[] = {1, 7, 3, 9, 5};
  5.     double array2[] = {1.1, 7.7, 3.3, 9.9, 5.5};
  6.  
  7.     int compare (const void * a, const void * b) {
  8.         double diff = array2[*(int*)a] - array2[*(int*)b];
  9.         return  (0 < diff) - (diff < 0);
  10.     }
  11.  
  12.     int main(void) {
  13.         int perm[5], i;
  14.         int res[5];
  15.         for (i = 0 ; i != 5 ; i++) {
  16.             perm[i] = i;
  17.         }
  18.         qsort (perm, 5, sizeof(int), compare);
  19.         for (i = 0 ; i != 5 ; i++) {
  20.             res[i] = array1[perm[i]];
  21.         }
  22.         for (i = 0 ; i != 5 ; i++) {
  23.             printf("%d\n", res[i]);
  24.         }
  25.         return 0;
  26.     }
Success #stdin #stdout 0.01s 1720KB
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https://ideone.com/BEKEy
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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