Pointers to Functions

#include <stdio.h>
int dayu(int *,int *);
int dengyu(int *,int *);
int xiaoyu(int *,int *);
   main()
   {
      printf("%d/n",panduan(1,2,(int (*)(void *,void *))dayu));
      printf("%d/n",panduan(1,2,(int (*)(void *,void *))xiaoyu));
      printf("%d/n",panduan(1,2,(int (*)(void *,void *))dengyu));
   }
   int panduan(int a,int b,int (*comp)(void *,void *))
   {
      return (*comp)(a,b);
   }
   int dayu(int *a,int *b)
   {
      if(a>b)
         return 1;
      return 0;
   }
   
   int dengyu(int a,int b)
   {
      if(a==b)
         return 1;
      return 0;
   }
   int xiaoyu(int a,int b)
   {
      if(a<b)
         return 1;
      return 0;
   }