Help me to understand

can sumone help in understanding this piece of code-

Code:

main()
{
      int (*functable[2])(char *format, ...) ={printf, scanf};
      int i = 100;
      (*functable[0])("%d", i);
      (*functable[1])("%d", i);
      (*functable[1])("%d", i);
      (*functable[0])("%d", &i);
}

it gives error while compilation

Code:

main()
{
      // Create an array of function pointers.  Index 0 points to printf, index 1 points to scanf
      int (*functable[2])(char *format, ...) ={printf, scanf};

      int i = 100;

      // Equivalent to: printf("%d", i);
      (*functable[0])("%d", i);

      // Equivalent to: scanf("%d", i);
      (*functable[1])("%d", i);

      // Equivalent to: scanf("%d", i);
      (*functable[1])("%d", i);

      // Equivalent to: printf("%d", &i);
      (*functable[0])("%d", &i);
}

Note that the 2 scanf calls are incorrect since scanf should take a pointer as a parameter.

Also I get a warning about the initialization (you might too) since that isn't how printf and scanf are prototyped. (It's const char *format).

had no idea that you could create pointers to functions. mind == blown.

Originally Posted by Epy

had no idea that you could create pointers to functions. mind == blown.

So now it looks like you're ready for qsort.

Originally Posted by tabstop

So now it looks like you're ready for qsort.

Wow, well now I know what vl-sort is a wrapper of (in AutoLISP).