jump tables (-Edit- Eliminating conditional statements :-))

[Piru]

I won't give you the exact solution, but this should help still:

Code: [Select]


#include <stdio.h>

typedef int (*funcptr_t)(int, char *);

int func1(int x, char *str);
int func2(int x, char *str);
int func3(int x, char *str);

int main(void)
{
  funcptr_t funcarray[3] =
  {
    func1,
    func2,
    func3
  };
  int i;

  for (i = 0; i < 3; i++)
  {
    int ret;

    ret = funcarray[i](i * i + 2, &quot;moo&quot;);
    printf(&quot;ret %d\n&quot;, ret);
  }

  return 0;
}

int func1(int x, char *str)
{
  printf(&quot;func1 x=%d, str=<%s>\n&quot;, x, str);
  return 1;
}

int func2(int x, char *str)
{
  printf(&quot;func2 x=%d, str=<%s>\n&quot;, x, str);
  return 2;
}

int func3(int x, char *str)
{
  printf(&quot;func3 x=%d, str=<%s>\n&quot;, x, str);
  return 3;
}


[EDIT]changed i*i to i*i+2 to make it more obvious the input isn't always the index ;-)[/EDIT]