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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int arr[] = {3, 2, 6, 4};
  5.  
  6. int compare (const void * a, const void * b) {
  7.     int diff = arr[*(int*)a] - arr[*(int*)b];
  8.     return  diff;
  9. }
  10.  
  11. int main(void) {
  12.     int perm[4], i;
  13.  
  14.     for (i = 0 ; i != 4 ; i++) {
  15.         perm[i] = i ;
  16.     }
  17.     qsort (perm, 4, sizeof(int), compare);
  18.  
  19.     for (i = 0 ; i != 4 ; i++) {
  20.         printf("%d ", perm[i] + 1);
  21.     }
  22.     return 0;
  23. }
Success #stdin #stdout 0s 3140KB
comments (?)
stdin 
Standard input is empty
stdout 
2 1 4 3
https://ideone.com/wH1giv
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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