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  1. #include <iostream>
  2. #include <iomanip>
  3.  
  4. using namespace std;
  5.  
  6. void rearrange(int a[], int n)
  7. {
  8.     if (n%2) n++;
  9.     int k = 1, m = n/2;
  10.     if (m%2) ++m;
  11.     while(k < n/2)
  12.     {
  13.         int t = a[k];
  14.         a[k] = a[m];
  15.         a[m] = t;
  16.         k+=2; m+=2;
  17.     }
  18. }
  19.  
  20.  
  21. int main(int argc, char * argv[])
  22. {
  23.     int a[11];
  24.     for(int i = 0; i < 11; ++i) a[i] = i;
  25.     rearrange(a,11);
  26.     for(auto i: a) cout << i << " ";
  27. }
  28.  
Success #stdin #stdout 0s 4700KB
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stdin
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Standard input is empty
stdout
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0 6 2 8 4 10 1 7 3 9 5
https://ideone.com/Hcvk7l
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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