#define _CRT_SECURE_NO_WARNINGS 1
#include
#include
#include
 
 
void even_old_number(int *arr, int len)
{
     assert(arr);
     int i = 0;
     int j = 0;
     int tmp = 0;
     for (i = 0; i < len; i++)
     {
          while ((arr[i] % 2 == 0) && (i < len))
          {
               i++;
          }
          while ((arr[j] % 2 == 1) && (j < len))
          {
               j++;
          }
          if (i == len || j == len)
               return;
          if (i > j)
          {
               tmp = arr[i];
               arr[i] = arr[j];
               arr[j] = tmp;
               tmp = i;
               i = j;
               j = tmp;
          }
     }
}
 
 
 
int main()
{
     int arr[] = { 1, 2, 3, 4, 5 };
     int len = sizeof(arr) / sizeof(arr[0]);
      
     even_old_number(arr, len);
     int i = 0;
     for (i = 0; i < len; i++)
     {
          printf("%d ", arr[i]);
     }
     system("pause");
     return 0;
}

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