/prog/ - Three star programming

Name: Anonymous 2015-07-07 1:58

Hey guys, I found this gem in Reddit. This code will reverse an array in place with pointers.
http://www.reddit.com/r/programming/comments/cihh7/three_star_programmer/c0sug3o

#include <stdio.h>

void reverse(int ****, size_t);
void swap(int ****, int ****);

int main() {
   int arr[]={1, 2, 3, 4};
   int *p = arr;
   int **pp = &p;
   int ***ppp = &pp;
   int ****pppp = &ppp;

   reverse(pppp, 4);

   for (int i = 0; i < 4; i++) {
     printf("%d\n", *(***pppp + i));
   }
}

void reverse(int ****pppp, size_t size) {
   int *s = ***pppp;
   int **ps = &s;
   int ***pps = &ps;
   int ****ppps = &pps;

   int *e = (***pppp + size - 1);
   int **pe = &e;   
   int ***ppe = &pe;
   int ****pppe = &ppe;

   while (***ppps < ***pppe) {
      swap(ppps, pppe);    
      (***ppps)++;
      (***pppe)--;
   }
}

inline void swap(int ****x, int ****y) {
   const int temp = ****x;
   ****x = ****y;
   ****y = temp;
}

Three star programming

1 Name: Anonymous 2015-07-07 1:58

2 Name: Anonymous 2015-07-07 3:58

Name: Anonymous 2015-07-07 1:58

Name: Anonymous 2015-07-07 3:58